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Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Bryan T. Spofford — 4 Patents

UNUnknown: 4 patents #4,220 of 83,584Top 6%
Denver, CO: #1,009 of 4,554 inventorsTop 25%
Colorado: #10,815 of 40,980 inventorsTop 30%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
Bryan T. Spofford has been granted 4 US patents while listed as an inventor at Unknown. The first was granted in 1992 and the most recent in March 1994. Bryan T. Spofford ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Bryan T. Spofford in Denver, CO, US.

Patents per Year

Patents granted per year, 1992 to 1994Bar chart with a peak of 2 patents in 1993.peak 21992: 1 patents19921993: 2 patents19931994: 1 patents1994

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
5297546 Transtracheal catheter system and method Kent L. Christopher, Michael E. Hovanes 1994-03-29
5186168 Transtracheal catheter system and method Kent L. Christopher, Michael E. Hovanes 1993-02-16
5181509 Transtracheal catheter system Kent L. Christopher 1993-01-26
5090408 Transtracheal catheter system and method Kent L. Christopher, Michael E. Hovanes 1992-02-25