Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Karl N. Walker — 6 Patents

CCCompaq Computer: 5 patents #216 of 1,604Top 15%
St. George, UT: #24 of 203 inventorsTop 15%
Utah: #3,432 of 19,430 inventorsTop 20%
Overall (All Time): #779,687 of 4,157,543Top 20%
6 Patents All Time
Karl N. Walker has been granted 6 US patents while listed as an inventor at Compaq Computer. The first was granted in 1992 and the most recent in January 2017. Karl N. Walker ranks #779,687 of 4,157,543 US inventors in our database (top 18.8%). Patent records list Karl N. Walker in St. George, UT, US.

Patents per Year

Patents granted per year, 1992 to 2017Bar chart with a peak of 3 patents in 1992.peak 31992: 3 patents19921998: 1 patents19982001: 1 patents20012017: 1 patents2017

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
9539451 Heat-sensitive trigger for a fire sprinkler valve 2017-01-10
6229709 Printed circuit board card guide Thomas T. Hardt 2001-05-08 $51,234,000
5754406 Printed circuit board card guide having isolation arms and means for securing PCB Thomas T. Hardt 1998-05-19 $117,917,000
5138706 Password protected enhancement configuration register for addressing an increased number of adapter circuit boards with target machine emulation capabilities Maria L. Melo 1992-08-11 $14,330,000
5101497 Programmable interrupt controller Paul R. Culley, Montgomery C. McGraw, Lazaro D. Perez 1992-03-31 $14,425,000
5095428 Cache flush request circuit flushes the cache if input/output space write operation and circuit board response are occurring concurrently Paul R. Culley 1992-03-10 $31,674,000