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Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Leonard Grech — 4 Patents

UNUnknown: 1 patents #29,356 of 83,584Top 40%
Capistrano Beach, CA: #24 of 86 inventorsTop 30%
California: #126,026 of 386,348 inventorsTop 35%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
Leonard Grech has been granted 4 US patents while listed as an inventor at Unknown. The first was granted in 1982 and the most recent in January 2001. Leonard Grech ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Leonard Grech in Capistrano Beach, CA, US.

Patents per Year

Patents granted per year, 1982 to 2001Bar chart with a peak of 2 patents in 1987.peak 21982: 1 patents19821987: 2 patents19872001: 1 patents2001

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
6172805 Poly-powered optical system 2001-01-09
4681084 Burner control system 1987-07-21
RE32415 Adjustable power transmitting device 1987-05-12
4332147 Adjustable power transmitting device 1982-06-01