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USPTO Patent Rankings Data through Dec 31, 2025
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Ernest A. Ferris — 3 Patents

BOBorgwarner: 2 patents #591 of 1,733Top 35%
Oak Brook, IL: #56 of 167 inventorsTop 35%
Illinois: #26,899 of 84,256 inventorsTop 35%
Overall (All Time): #1,328,092 of 4,157,543Top 35%
3 Patents All Time
Ernest A. Ferris has been granted 3 US patents while listed as an inventor at Borgwarner. The first was granted in 1985 and the most recent in March 1991. Ernest A. Ferris ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list Ernest A. Ferris in Oak Brook, IL, US.

Patents per Year

Patents granted per year, 1985 to 1991Bar chart with a peak of 1 patents in 1985.peak 11985: 1 patents19851987: 1 patents19871991: 1 patents1991

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
4998605 Plastic cage for a one-way clutch 1991-03-12
4709795 Hydraulically-actuated starting clutch assembly with balanced piston actuation 1987-12-01
4520912 Hydraulically actuated starting clutch assembly John W. McColl 1985-06-04 $7,340,000