Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
AS

Alexander S. Sinclair — 4 Patents

3M: 2 patents #5,350 of 11,543Top 50%
Cheadle, GB: #12 of 73 inventorsTop 20%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
Alexander S. Sinclair has been granted 4 US patents while listed as an inventor at 3M. The first was granted in 1980 and the most recent in July 2001. Alexander S. Sinclair ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Alexander S. Sinclair in Cheadle, GB.

Patents per Year

Patents granted per year, 1980 to 2001Bar chart with a peak of 1 patents in 1980.peak 11980: 1 patents19801984: 1 patents19841998: 1 patents19982001: 1 patents2001

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
6256166 Tape cassette for cleaning VCR heads and transport components Robert D. DeMaster, Alexander R. Mitka, John V. Nowicki, Richard E. Skare, Mark W. Weavers 2001-07-03 $27,185,000
5841613 Tape cassette for cleaning VCR heads and transport components Robert D. DeMaster, Alexander R. Mitka, John V. Nowicki, Richard E. Skare, Mark W. Weavers 1998-11-24 $15,904,000
4454818 Advancing of apparatus for refurbishing overhead structures Barry C. Eccleston, Michael Elliot 1984-06-19
4201275 Means for the renovating and refurbishing of overhead structures Barry C. Eccleston 1980-05-06