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

Robert L. Hammond — 3 Patents

CACalcomp: 2 patents #16 of 71Top 25%
UPUniversity of Pennsylvania: 1 patents #1,260 of 2,719Top 50%
Prospect Park, PA: #10 of 22 inventorsTop 50%
Pennsylvania: #23,787 of 74,527 inventorsTop 35%
Overall (All Time): #1,328,092 of 4,157,543Top 35%
3 Patents All Time
Robert L. Hammond has been granted 3 US patents while listed as an inventor at Calcomp. The first was granted in 1990 and the most recent in December 1994. Robert L. Hammond ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list Robert L. Hammond in Prospect Park, PA, US.

Patents per Year

Patents granted per year, 1990 to 1994Bar chart with a peak of 1 patents in 1990.peak 11990: 1 patents19901993: 1 patents19931994: 1 patents1994

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
5375196 Rapid line drawing in computer graphics employing floating-point arithmetic Bala R. Vatti, Mark Duckworth 1994-12-20 $478,000
5265210 Method and apparatus for plotting pixels to approximate a straight line on a computer display device without substantial irregularities Bala R. Vatti 1993-11-23 $450,000
4979936 Autologous biologic pump motor Larry W. Stephenson, Michael Acker, William A. Anderson 1990-12-25