Fiber-Optic Sensor Patent Landscape 2026
Fiber-Optic Sensor Patent Landscape in 2026
The fiber-optic sensor patent space is highly concentrated, with a single applicant holding a commanding share of the top-ranked filers and bioanalytical sensing dominating the technology mix. Activity peaked around 2019 and annual volume has eased since, signaling a maturing field where incremental optical and physical-sensing niches remain accessible to new entrants.
Corixa Corp leads a sharply tiered applicant field
Corixa Corp sits at the top of the Baker Hughes Co holds third place at 154 patent records, already a substantial drop from second.
The top five filers account for 35% of the combined patent records of the hundred largest filers, indicating strong concentration at the apex but meaningful activity distributed across a large tail of secondary players. The tier gap between first and second place is unusually wide, suggesting the leader built its position through a distinct, focused strategy rather than broad organic growth shared across the field.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Corixa Corp | 937 | |
| 2 | Human Genome Sciences Inc | 268 | |
| 3 | Baker Hughes Co | 154 | |
| 4 | Trustees of Tufts College | 118 | |
| 5 | F HOFFMANN LA ROCHE & CO AG | 93 | |
| 6 | Medtronic MiniMed Inc | 90 | |
| 7 | Subaru Corp | 81 | |
| 8 | Halliburton Energy Services Inc | 77 | |
| 9 | Ecolab USA Inc | 59 | |
| 10 | China Jiliang University | 58 |
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 11 | BECTON DICKINSON & CO | 58 | |
| 12 | The Board of Trustees of the Leland Stanford Junior University | 57 | |
| 13 | FiberChem Inc | 54 | |
| 14 | Infectious Disease Research Institute | 52 | |
| 15 | Augurex Life Sciences Corp | 50 | |
| 16 | Regents of the University of California | 49 | |
| 17 | Sumitomo Electric Industries Ltd | 47 | |
| 18 | RUBEN STEVEN M | 46 | |
| 19 | Vasamed Inc | 43 | |
| 20 | General Electric Co | 43 |
Corixa’s dominance in peptide/protein and medicinal-preparation classes signals that much of the corpus reflects biosensor and immunoassay applications rather than purely photonic sensing. Engineers targeting structural health monitoring or downhole sensing face a less crowded applicant landscape at the top.
The most recent filing years (2024–2026) are subject to publication lag and are expected to under-represent actual activity; conclusions about current pace should rely on the 2019–2023 window. Longer-window growth, applicant concentration, and technology-route coverage are therefore more reliable signals than the latest-year bar alone.
Annual filings have eased from a 2019 peak; bioanalytical classes dominate the IPC mix
The filing trend chart tracks annual activity from 2017 to 2025, while the technology composition chart reveals which IPC classes account for the bulk of the corpus. Together they show a past-peak field with a bioanalytical center of gravity and several under-served optical and physical-measurement branches.
Annual filing trend
Filings climbed to a high of 286 patent records in 2019 before declining through 2021 and partially recovering in 2022–2023. The 2024–2025 figures appear low due to publication lag and should not be read as continued decline. The multi-year window still shows meaningful accumulated volume, consistent with a field that is past peak but not dormant.
↗ Hover for values · click a bar to ask EurekaTechnology composition
G01N (Material analysis and testing) is the dominant IPC class by a wide margin, reflecting the bioanalytical and chemical-sensing core of the corpus. Peptide/protein (C07K), medicinal preparations (A61K), and genetic engineering (C12N) classes together indicate that immunoassay-based fiber sensing is the largest sub-segment. Optical elements (G02B), general measurement (G01D), and physical sensing classes such as G01B, G01J, and G01K are present but hold notably smaller shares, pointing to relative sparsity in photonic and physical-parameter branches.
↗ Hover for values · click a bar to ask EurekaHighly cited patent families surfaced by the query
Citation-heavy patent families returned by the query. Use this section as citation context, not as a curated list of the most topic-specific patents.
Distributed fiber optic sensor system with improve…
A fiber optic sensor system includes an optical source to output a first optical signal to launch into an optical fiber, and a coherent detector to mix a coherent Rayleigh backscatter signal generated by the optical fiber in response to the first optical signal with a second optical signal output by the optical source and to generate a mixed output signal… (excerpt from the patent abstract)
| # | Patent | Citations |
|---|---|---|
| 1 | Accident avoidance system | 1,258 |
| 2 | Target analyte sensors utilizing microspheres | 1,010 |
| 3 | Fiber optic sensor with encoded microspheres | 998 |
| 4 | Fiber optic sensor with encoded microspheres | 877 |
| 5 | Target analyte sensors utilizing Microspheres | 840 |
| 6 | Fiber optical probe connector for physiologic meas… | 761 |
| 7 | Fiber-optic probe for the measurement of fluid par… | 759 |
| 8 | Fiber-optic physiological probes | 747 |
Ranked by total forward citations. Citation counts favour older and broadly cited patent families, and broad or adjacent patents may appear when they match the search scope. Treat this section as citation context, not as a curated list of the most topic-specific patents. Some patent titles may be shown in their original, non-English language where an accurate translation could not be guaranteed.
What the competitive structure means for R&D investment
Four structural observations—lifecycle stage, applicant concentration, co-filing patterns, and geographic reach—frame where the defensible white space lies and where competitive barriers are highest.
Field is in decline phase from a 2019 peak
Annual filing volume eased back from the 2019 peak of 286 patent records and has not recovered to that level. The lifecycle is classified as Decline based on this sustained easing. For R&D teams this signals that broad platform patents are largely filed; incremental innovation in niche sensing modalities or novel signal-processing approaches is more likely to yield defensible positions than foundational fiber-optic claims.
Lifecycle: DeclineExtreme first-mover gap at the top; long tail is accessible
The top five filers hold 35% of the hundred largest filers’ combined patent records, with Corixa Corp alone accounting for a disproportionately large share at 937 patent records versus 268 for second-placed Human Genome Sciences Inc. Below the top five, the ranking disperses quickly across oilfield services firms, universities, and specialty sensor companies. New entrants targeting physical sensing or optical fiber design face far less concentrated opposition than those pursuing bioanalytical fiber sensors.
Concentration: HighCo-filing is limited but industrially and academically patterned
The most active co-filing pair is Steven M. Ruben with Human Genome Sciences Inc at 39 joint patent records, reflecting a named-inventor-plus-assignee relationship typical of pharmaceutical biology. Subaru Corp co-files with the University of Tokyo (7 records), illustrating an industrial-academic bridge in structural sensing. Corixa Corp has smaller co-filing relationships with Mayo Foundation for Medical Education and Research and with the University of Washington (2 records each). Overall, inter-company co-development is sparse, leaving open collaboration opportunities particularly in oilfield and infrastructure sensing.
Collaboration: SparseUS leads; China and Europe are meaningful secondary jurisdictions
The United States is the lead filing jurisdiction by patent records, followed by China and then Europe via the EPO. WIPO PCT filings rank fourth, indicating that many families are being internationalized. Japan, Canada, and Australia follow. South Korea and India are present but smaller, suggesting selective rather than systematic Asian coverage outside China. R&D teams seeking freedom-to-operate in emerging manufacturing markets may find lighter coverage in Southeast Asia and South America.
Geography: US-ledGo beyond the landscape: Eureka’s TRIZ Solution agent breaks down an R&D problem and returns patented concept solutions, each with a technical approach and cited patent & literature evidence.
| Applicant | Collaborator | Co-filings |
|---|---|---|
| RUBEN STEVEN M | Human Genome Sciences Inc | 39 |
| Subaru Corp | University of Tokyo | 7 |
| Corixa Corp | Mayo Foundation for Medical Education and Research | 2 |
| Corixa Corp | University of Washington | 2 |
| Subaru Corp | Takeda Nobuo | 2 |
| Subaru Corp | Hitachi Cable Ltd | 2 |
| Infectious Disease Research Institute | Institute for Advanced Health | 2 |
Co-filing pairs, ranked by the number of jointly-filed patent families.
Corixa Corp in bioanalytical sensing vs. Baker Hughes in downhole optical measurement
The top two active applicants by patent records occupy entirely different technology segments, making direct head-to-head competition rare. Momentum trends reveal contrasting trajectories among the mid-tier players.
Corixa Corp
Corixa Corp leads with 937 patent records concentrated in peptide and protein chemistry (C07K 14), medicinal preparations (A61K 39), and biosensing material analysis (G01N 33). This profile reflects immunoassay and antigen-based fiber sensor applications. The applicant’s momentum data is not included in the recent-trend set, consistent with a legacy portfolio built before the analysis window’s peak. The scale of this position creates a high barrier in biological fiber sensor chemistry.
patent records: 937Baker Hughes Co
Baker Hughes Co ranks third with 154 patent records, focused on optical material analysis (G01N 21), general measurement recording (G01D 5), and downhole well monitoring (E21B 47). This is the dominant player in oilfield distributed fiber sensing. Recent momentum shows Baker Hughes as a new entrant in the most recent filing window, suggesting renewed or re-initiated activity in fiber sensing despite the broader field decline. Its oilfield focus means limited overlap with bioanalytical leaders.
patent records: 154| Applicant | Recent (3 yrs) | Trend |
|---|---|---|
| Baker Hughes Holdings LLC | 4 | ▲ new entrant |
| Subaru Corp | 3 | ▼ -75% |
| Halliburton Energy Services Inc | 2 | ▼ -83% |
| Infectious Disease Research Institute | 1 | ▲ new entrant |
Under-served branches in optical elements and enzymatic biosensing
Several IPC branches adjacent to the dominant G01N core show meaningful patent-record counts but represent smaller relative shares of the corpus, indicating areas where the field has not yet been fully exploited. These observations reflect sparsity relative to the dominant branches and are not validated commercial opportunities without further analysis.
G02B · Optical elements and fiber systems
G02B (Optical elements and systems) holds 1,059 patent records, a 4% share of the corpus—substantial in absolute terms but underrepresented relative to the bioanalytical G01N class. The technical value is high: advances in specialty fiber design, micro-optical couplers, and photonic crystal fibers directly enable new sensing modalities. An entry path exists through novel waveguide architectures or miniaturized inline sensing elements, areas where the applicant field is fragmented below the top five filers.
Search this in Eureka →C12Q · Enzymatic and nucleic acid sensing
C12Q (Measuring and testing involving enzymes or nucleic acids) shows 1,223 patent records at a 5% share. Despite the overall bioanalytical dominance of the corpus, enzyme-linked and DNA-hybridization fiber sensor approaches are relatively sparse compared to immunoassay-based methods covered by G01N and C07K. Biosensor developers combining fiber optics with CRISPR-based or aptamer recognition elements could find differentiated positions here, particularly given the growing diagnostic interest in point-of-care nucleic acid detection.
Search this in Eureka →How leading applicants differ across technology routes
Strength of each leader across the main technology routes.
| Player | G01N 21 · Material analysis & testing | G01N 33 · Material analysis & testing | C07K 14 · Peptides & proteins | A61K 39 · Medicinal preparations | C12Q 1 · Measuring & testing involving enzymes/DNA |
|---|---|---|---|---|---|
| Corixa Corp | Absent | Strong · 754 | Strong · 840 | Strong · 789 | Strong · 623 |
| Human Genome Sciences Inc | Absent | Strong · 201 | Strong · 196 | Absent | Strong · 159 |
| Trustees of Tufts College | Strong · 118 | Strong · 82 | Absent | Absent | Moderate · 47 |
| RUBEN STEVEN M | Absent | Strong · 66 | Strong · 75 | Absent | Strong · 49 |
| F. Hoffmann-La Roche & Co AG | Absent | Strong · 72 | Absent | Strong · 72 | Absent |
| DILLON DAVIN C | Absent | Strong · 40 | Strong · 48 | Strong · 46 | Absent |
| ROSEN CRAIG A | Absent | Strong · 41 | Strong · 50 | Absent | Strong · 30 |
Frequently asked questions
There are 2,206 patent families in scope for this analysis, covering fiber-optic sensor technologies across global jurisdictions.
Corixa Corp leads with 937 patent records, more than three times the count of the second-ranked applicant, Human Genome Sciences Inc at 268 patent records. Corixa’s portfolio is concentrated in bioanalytical and immunoassay-based fiber sensing.
The field peaked in 2019 at 286 patent records annually and annual volume has eased since. The lifecycle is assessed as Decline based on this sustained easing from the 2019 peak. The most recent filing years (2024–2026) are under-counted due to publication lag and do not reflect the full current activity level.
The United States leads by patent records, followed by China, Europe via the EPO, and WIPO PCT. Japan, Canada, and Australia are the next tier. Coverage in South Korea, India, and most of Southeast Asia and South America is lighter.
The most-cited works identified in the corpus include titles covering accident avoidance systems (1,258 citations), target analyte sensors utilizing microspheres (1,010 and 840 citations), fiber optic sensors with encoded microspheres (998 and 877 citations), and fiber-optic physiological probes and fluid parameter measurement probes (ranging from 747 to 761 citations).
Baker Hughes Co (154 patent records, currently a new entrant in the recent filing window) and Halliburton Energy Services Inc (77 patent records, recent trend down 83%) are the two largest dedicated oilfield sensing players in the ranked corpus. Schlumberger-affiliated entities also appear in the broader applicant list.
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Disclaimer. This page is generated from PatSnap Eureka data drawn from a limited snapshot of global patent and scientific-literature records, and is provided for general information and reference only.
Patent data carries inherent limitations: recent filings (typically the most recent 18–24 months) are under-counted due to standard publication lag; counts may be reported at either a patent-family or a patent-record basis and are not always directly comparable; classification, applicant-name, and citation data may contain errors, duplicates, or omissions; and the underlying search query defines and constrains the scope shown. As a result, the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
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