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

Thomas E. Helfrich — 3 Patents

SDSquare D: 2 patents #240 of 756Top 35%
ASAktiebolaget Skf: 1 patents #798 of 1,598Top 50%
Santa Ana, CA: #426 of 1,362 inventorsTop 35%
California: #150,760 of 386,348 inventorsTop 40%
Overall (All Time): #1,328,092 of 4,157,543Top 35%
3 Patents All Time
Thomas E. Helfrich has been granted 3 US patents while listed as an inventor at Square D. The first was granted in 1995 and the most recent in November 1998. Thomas E. Helfrich ranks #1,328,092 of 4,157,543 US inventors in our database (top 31.9%). Patent records list Thomas E. Helfrich in Santa Ana, CA, US.

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
5829890 Bearing assembly axial load application Bernhard Bauer, Burkhard Buchheim, Christian Knoche, Lothar Meidl, Arno Stubenrauch +1 more 1998-11-03 $209,000
5465011 Uninterruptible power supply with improved output regulation Frank D. Miller 1995-11-07
5461263 Method of phase synchronization between two AC signals 1995-10-24