Electric Ship Propulsion Anti-Fouling Patent Snapshot
Patenting in electric ship propulsion anti-fouling is extremely nascent, with 3 patent families in scope concentrated among a handful of marine OEMs and independent inventors. Activity peaked in 2019 and has since been dormant, signalling an early-decline phase with no visible fresh entrants.
Brunswick Corp leads a highly concentrated, early-stage field
Brunswick Corp holds the top position among the ranked filers, followed by Volvo Penta AB and individual inventor STOLPER PETER R. The top five filers together account for all of the top 100 ranked filers’ combined total, confirming that this is a field shaped entirely by a very small set of participants.
There is effectively no second tier: the gap between Brunswick Corp’s 5 patent records and the remaining applicants — Volvo Penta AB at 3, STOLPER PETER R at 2, and Sanoyas Corp and Wynn Gill Associates at 1 each — illustrates how thin the competitive base is.
| # | Applicant | Patent records | Share |
|---|---|---|---|
| 1 | Brunswick Corporation | 5 | |
| 2 | Volvo Penta AB | 3 | |
| 3 | STOLPER PETER R | 2 | |
| 4 | Sanoyas Corp | 1 | |
| 5 | Wynn Gill Associates | 1 |
Brunswick Corp’s lead, concentrated in ship and marine vessel classifications alongside hydraulic engineering and electric-shock barrier sub-classes, suggests a proprietary system-level approach to electrochemical fouling prevention rather than a broad platform strategy.
Filing data for the most recent 18–24 months should be treated as incomplete due to publication lag; the apparent zero activity in 2020–2026 partly reflects this effect, though the 2019 peak and subsequent absence of new records are consistent with a field in decline.
A single active year, a narrow technology mix, and no follow-on filings
The filing trend and technology composition together reveal a field that mobilised briefly in 2019 and did not sustain momentum, while the IPC mix shows marine vessel and propulsion classes showing visible activity in with only thin coverage in corrosion chemistry.
Annual filing trend
All recorded activity falls in 2019, with zero filings in every other year from 2017 to 2026. Given publication lag, 2024–2026 data remain incomplete, but the absence of filings from 2020 through 2023 — fully published years — reinforces the decline read. Engineers should not infer ongoing activity from this corpus.
↗ Hover for values · click a bar to ask EurekaTechnology composition
B63B (Ships and marine vessels) and B63H (Marine propulsion and steering) account for the bulk of classifications, confirming that protection is primarily framed around the vessel and propulsion system rather than the chemistry. C23F (Corrosion and metal removal) appears in 3 patent records, representing the only dedicated anti-corrosion/anti-fouling chemical branch; E02B and H05C each appear in 2 records, indicating ancillary hydraulic and electric-barrier coverage.
↗ 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.
SCHIFFSANTRIEBSSYSTEM UND VERFAHREN ZUM SCHUTZ EIN…
| # | Patent | Citations |
|---|---|---|
| 1 | Apparatus and method for inhibiting fouling of an … | 46 |
| 2 | Marine propulsion unit | 15 |
| 3 | Apparatus and method for inhibiting fouling of an … | 3 |
| 4 | Apparatus and method for inhibiting fouling of an … | 1 |
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 structure means for R&D investment decisions
With fewer than five active patent families and no filings after 2019, this landscape is an outlier in marine electrification — sparse enough that a single well-scoped filing program could reshape the competitive map.
Decline stage following a single-year peak
The lifecycle is classified as Decline, with annual filings easing back from the 2019 peak and no recorded activity in subsequent years. For R&D teams, this means existing IP presents minimal blocking risk but also minimal prior-art density to build on. Any new programme would effectively be re-opening the field from scratch.
Lifecycle: DeclineExtreme concentration; two marine OEMs hold the balance of power
The top five filers account for all of the combined total of the ranked applicants visible in this query, and just two entities — Brunswick Corp and Volvo Penta AB — hold the substantive positions. This level of concentration in a decline-stage field is unusual; it suggests that neither player has found commercial justification to extend their portfolio, leaving the space open for a focused entrant with a differentiated technical approach.
High concentrationNo co-filing activity detected
Evidence pending: no collaboration pairs are recorded in this corpus. The absence of co-applicants across all records suggests that the few actors who have engaged with this topic have pursued fully proprietary strategies rather than consortium or joint-development approaches. This may reflect the early-niche status of the technology rather than deliberate exclusivity.
No co-filersEuropean filings are visible in; limited Asian and North American coverage
Europe (EPO) leads jurisdiction coverage with 5 patent records, followed by Canada and the United States at 2 each. China and Japan each have 1 record, and Lithuania appears as a further jurisdiction. The EPO lead aligns with Volvo Penta AB’s Nordic base and Brunswick Corp’s European market focus, but the thin coverage in Asia-Pacific leaves those markets largely unprotected — a consideration for any entrant targeting shipbuilding hubs in South Korea, China, or Japan.
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Co-filing pairs, ranked by the number of jointly-filed patent families.
Assignee snapshot from the current evidence set
The applicants below are visible in this query result. Because the evidence set is relatively small, read this section as a directional snapshot rather than a full competitive ranking.
Brunswick Corp
Brunswick Corp holds 5 patent records — the largest position in this topic — concentrated in B63B 59 (Ships and marine vessels), E02B 15 (Hydraulic and waterway engineering), and H05C 1 (Electric-shock fences and barriers). The H05C classification indicates that Brunswick’s anti-fouling approach involves electrical-field or electrochemical deterrence systems integrated into the propulsion unit. Momentum data are not available for this applicant.
patent records: 5Volvo Penta AB
Volvo Penta AB holds 3 patent records, split across B63B 59 (Ships and marine vessels), C23F 13 (Corrosion and metal removal), and B63H 5 (Marine propulsion and steering). The C23F presence distinguishes Volvo Penta AB from Brunswick Corp, signalling a chemistry-level approach to fouling inhibition alongside mechanical propulsion protection. Momentum data are not available for this applicant.
patent records: 3Frequently asked questions
The evidence covers 3 patent families in scope for this topic globally.
Brunswick Corp is the top-ranked filer with 5 patent records, followed by Volvo Penta AB with 3 and individual inventor STOLPER PETER R with 2.
All recorded filing activity falls in 2019. No filings are recorded in any other year from 2017 through 2023, the years where publication lag is not a factor.
Europe (EPO) leads with 5 patent records, followed by Canada and the United States at 2 each. China and Japan each have 1 record, with Lithuania also appearing as a filing jurisdiction.
B63B (Ships and marine vessels) has 9 records and B63H (Marine propulsion and steering) has 7, making them the visible classes. C23F (Corrosion and metal removal) has 3 records, while E02B and H05C each have 2.
No co-applicant or collaboration pairs are recorded in the evidence for this topic. All filers appear to have pursued independent proprietary strategies.
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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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