Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Robert E. Birkett — 3 Patents

SPSimmonds Precision Products: 3 patents #39 of 227Top 20%
Shelburne, VT: #46 of 140 inventorsTop 35%
Vermont: #1,715 of 4,968 inventorsTop 35%
Overall (All Time): #1,328,092 of 4,157,543Top 35%
3 Patents All Time
Robert E. Birkett has been granted 3 US patents while listed as an inventor at Simmonds Precision Products. The first was granted in 1994 and the most recent in October 1995. Robert E. Birkett ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list Robert E. Birkett in Shelburne, VT, US.

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5456108 Baffle assembly for ultrasonic liquid level measuring probe 1995-10-10
5410518 Ultrasonic transducer assembly for measuring liquid level 1995-04-25
5315563 External sealed intrusive mounting arrangement for a fuel level sensor Frederick L. Lichtenfels, II, Ward J. Nial, Frederick G. Hoff 1994-05-24