Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Robert K. Stephens — 5 Patents

APApplied Power: 3 patents #24 of 150Top 20%
PDPolaroid Corporation, Patent Dept.: 1 patents #7 of 23Top 35%
POPolaroid: 1 patents #849 of 902Top 95%
Burlington, MA: #198 of 774 inventorsTop 30%
Massachusetts: #23,696 of 88,656 inventorsTop 30%
Overall (All Time): #907,971 of 4,157,543Top 25%
5 Patents All Time
Robert K. Stephens has been granted 5 US patents while listed as an inventor at Applied Power. The first was granted in 1980 and the most recent in December 1987. Robert K. Stephens ranks #907,971 of 4,157,543 US inventors in our database (top 21.8%). Patent records list Robert K. Stephens in Burlington, MA, US.

Patents per Year

Patents granted per year, 1980 to 1987Bar chart with a peak of 2 patents in 1985.peak 21980: 1 patents19801985: 2 patents19851986: 1 patents19861987: 1 patents1987

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
4710426 Solar radiation-control articles with protective overlayer 1987-12-01 $3,513,000
4588171 Shock absorber and air spring assembly 1986-05-13
4513845 Suspension system for a tilt cab truck Raymond S. Clark 1985-04-30
4506751 Tilt cab truck with anti-dive and anti-sway control 1985-03-26
4186005 Photographic products and processes employing roll film with acid backing layer Richard J. Haberlin 1980-01-29 $922,000