CLEARSIGN COMBUSTION CORPORATION

CLEARSIGN COMBUSTION CORPORATION has been granted 81 US utility patents between 2015 and 2022, placing CLEARSIGN COMBUSTION CORPORATION at rank #4,371 across all assignees tracked by PlainPatent. This portfolio spans 42 distinct Cooperative Patent Classification (CPC) subclasses, averaging 30.3 claims per patent with primary concentration in F23C (METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN  ; A CARRIER GAS OR; AIR). As a US Corporation, CLEARSIGN COMBUSTION CORPORATION is one of the more focused assignees in the PatentsView dataset. The composite Innovation Score of 53.5/100 blends portfolio volume, filing velocity, technology breadth, and claim depth into a single comparable measure drawn directly from USPTO PatentsView records.

Filing cadence tells the strategic story. Between 2020 and 2025 the company received 4 grants, compared with 77 in the 2015–2019 window — a -95% shift in five-year velocity. A cooling filing rate may reflect portfolio consolidation, shifting priorities, or reduced R&D throughput. The US Corporation classification further shapes interpretation, since corporate, government, and individual filers pursue patents for materially different reasons.

Claim depth and technology breadth together indicate competitive posture. CLEARSIGN COMBUSTION CORPORATION's 30.3 average claims per patent reflects complex, broadly scoped inventions that are difficult for competitors to design around, while a multi-domain presence across 42 subclasses balances depth with breadth. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark CLEARSIGN COMBUSTION CORPORATION against peers pursuing similar technology classes.