Thermoelectric Waste Heat Recovery Patents: Leaders & Trends 2026
Thermoelectric waste heat recovery patents: who holds the ground and where it is still open
Filing has cooled from its 2022 peak. 282 records in 2022 fell to 156 by 2024, a 41% drop across that three-year span, though 2025-2026 figures are still filling in under the usual publication lag. Annual filings rose to a peak of 282 in 2022 before falling to 156 by 2024, a 41% decline over that span. 2025 and 2026 counts are understated by the roughly 18-month lag between filing and publication and should not be read as a continuing decline yet.
- 1THE TRUSTEES OF PRINCETON UNIV2.5%
- 2MASSACHUSETTS INST OF TECH2.4%
- 3RGT UNIV OF CALIFORNIA2.3%
- 4FACE INTERNATIONAL CORP1.9%
- 5GENTHERM INC1.5%
See the full thermoelectric waste heat recovery analysis in Eureka
- The complete ranking, not just the top five
- Every IPC branch with its share of the corpus
- The most-cited records, and where claim space is still thin
Common questions about this landscape
Who holds the most thermoelectric waste heat recovery patents?
The leading assignee in this dataset holds 119 of the 4,850 records in scope, with the field fragmented well beyond that. The top 5 assignees combined account for only 10.4% of all records, and the top 10 combined reach 16.3%. That means no single company or institution controls a blocking share of the art, and freedom-to-operate work needs to look well past the largest few portfolios.
Is thermoelectric patent filing activity growing or shrinking?
Filing rose to a peak of 282 records in 2022, then declined to 156 by 2024, a drop of 41% over that three-year span. However, publication typically lags filing by roughly 18 months, so the lower counts recorded for 2025 and 2026 are still filling in and should not yet be read as confirmation of a continuing slowdown. A clearer read on the current trajectory will only be available once those years fully publish.
Which patent classes cover thermoelectric generator technology?
The largest concentration sits in H01L (semiconductor devices), covering 31.5% of the 4,850 records, followed by H10N (other electric solid-state devices) at 20.8%. Smaller but still notable shares appear in G02B, H01M, H02N, H10D, H02J and F25B, each in the 4-7% range. Because records can carry multiple IPC classes, these shares add up to more than 100% of the record total, which is expected.
Disclaimer. This analysis is based on Patsnap Eureka data drawn from a limited snapshot of global patent records and is provided for general information and reference only. Patent data carries inherent limitations — recent filings are under-counted because of publication lag, counts may be on a record or family basis, classification and applicant-name data may contain errors or duplicates, and the underlying search query defines the scope shown — so the analysis may be incomplete or inaccurate and may not reflect the full technology landscape.
Nothing here is an exhaustive prior-art, novelty, freedom-to-operate or validity search, nor does it constitute legal, financial or professional advice, and it should not be relied upon as such. Verify independently and review with qualified patent and legal professionals before acting on it.
Method: Filing trend and technology composition. Derived from a Patsnap search on Thermoelectric Waste Heat Recovery covering 2015–2026, data cut-off 2026-07-31. Counts reflect published records only and shift as new filings publish. Every share divides by all records in scope. Data: Patsnap Eureka. See the full landscape report.