Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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David Klein — 3 Patents

UNUnknown: 1 patents #29,356 of 83,584Top 40%
Columbia, MD: #455 of 1,501 inventorsTop 35%
Maryland: #10,230 of 35,612 inventorsTop 30%
Overall (All Time): #1,328,092 of 4,157,543Top 35%
3 Patents All Time
David Klein has been granted 3 US patents while listed as an inventor at Unknown. The first was granted in 1981 and the most recent in October 2017. David Klein ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list David Klein in Columbia, MD, US.

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
9805209 Systems and methodologies for managing document access permissions Mark Peter Naglost, Scott Coles, Justin Dahl 2017-10-31
7996474 Placing email substrings in a new chronological order 2011-08-09
4294035 Device with visual and audio output 1981-10-13