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

Douglas C. Barlow — 3 Patents

Microsoft: 2 patents #17,644 of 40,388Top 45%
DEDigital Equipment: 1 patents #1,005 of 2,100Top 50%
Redmond, WA: #3,570 of 8,547 inventorsTop 45%
Washington: #28,186 of 76,902 inventorsTop 40%
Overall (All Time): #1,328,092 of 4,157,543Top 35%
3 Patents All Time
Douglas C. Barlow has been granted 3 US patents while listed as an inventor at Microsoft. The first was granted in 1993 and the most recent in November 2002. Douglas C. Barlow ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list Douglas C. Barlow in Redmond, WA, US.

Patents per Year

Patents granted per year, 1993 to 2002Bar chart with a peak of 1 patents in 1993.peak 11993: 1 patents19931998: 1 patents19982002: 1 patents2002

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
6484259 Methods and arrangements for mapping widely disparate portable tokens to a static machine concentric cryptographic environment 2002-11-19 $181,413,000
5742756 System and method of using smart cards to perform security-critical operations requiring user authorization Blair B. Dillaway, Terry M. Lipscomb 1998-04-21 $138,628,000
5204961 Computer network operating with multilevel hierarchical security with selectable common trust realms and corresponding security protocols 1993-04-20 $8,579,000