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

Craig D. Keefer — 6 Patents

CCCompaq Computer: 3 patents #362 of 1,604Top 25%
DEDigital Equipment: 2 patents #602 of 2,100Top 30%
SIStratus Technologies Ireland: 1 patents #12 of 15Top 80%
Nashua, NH: #341 of 1,592 inventorsTop 25%
New Hampshire: #2,457 of 12,181 inventorsTop 25%
Overall (All Time): #779,687 of 4,157,543Top 20%
6 Patents All Time
Craig D. Keefer has been granted 6 US patents while listed as an inventor at Compaq Computer. The first was granted in 1999 and the most recent in February 2023. Craig D. Keefer ranks #779,687 of 4,157,543 US inventors in our database (top 18.8%). Patent records list Craig D. Keefer in Nashua, NH, US.

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
11586514 High reliability fault tolerant computer architecture Chester Pawlowski, John M. Chaves, Andrew Alden, Christopher D. Cotton, Michael J. Egan 2023-02-21
6353877 Performance optimization and system bus duty cycle reduction by I/O bridge partial cache line write Samuel H. Duncan, Glenn Arthur Herdeg, Ricky C. Hetherington, Maurice B. Steinman, Paul Michael Guglielmi 2002-03-05 $51,196,000
6249520 High-performance non-blocking switch with multiple channel ordering constraints Simon C. Steely, Jr., Stephen R. VanDoren, Madhumitra Sharma, David Wayne Davis 2001-06-19 $27,502,000
6128711 Performance optimization and system bus duty cycle reduction by I/O bridge partial cache line writes Samuel H. Duncan, Glenn Arthur Herdeg, Ricky C. Hetherington, Maurice B. Steinman, Paul Michael Guglielmi 2000-10-03 $45,402,000
6012120 Method and apparatus for providing DMA transfers between devices coupled to different host bus bridges Samuel H. Duncan, Thomas Adam McLaughlin, Paul Michael Guglielmi 2000-01-04
5953538 Method and apparatus providing DMA transfers between devices coupled to different host bus bridges Samuel H. Duncan, Thomas Adam McLaughlin, Paul Michael Guglielmi 1999-09-14