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USPTO Patent Rankings Data through Dec 31, 2025
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R. Mark Spencer — 1 Patent

BWBarry Wright: 1 patents #18 of 45Top 40%
Waltham, MA: #1,135 of 1,656 inventorsTop 70%
Massachusetts: #57,159 of 88,656 inventorsTop 65%
Overall (All Time): #2,406,284 of 4,157,543Top 60%
1 Patents All Time
R. Mark Spencer has been granted 1 US patent while listed as an inventor at Barry Wright. All of these patents were granted in 1988. R. Mark Spencer ranks #2,406,284 of 4,157,543 US inventors in our database (top 57.9%). Patent records list R. Mark Spencer in Waltham, MA, US.

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
4730861 Finger gripper with state indicator 1988-03-15 $1,215,000