Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025

Duncan, CA ranks #12,824 worldwide for total patents filed all time, with 136 patents from 22 inventors. Leading employers of inventors based in Duncan, CA include Medtronic, Macdon Industries, Dolby Laboratories Licensing.

Showing 1–22 of 22 inventors

Rank Inventor Primary Company Patents
1 Mark S. Leung Medtronic 48
2 Roger L. Patterson Macdon Industries 26
3 Damir Wallener Dolby Laboratories Licensing 14
#4 Michael Pastula Versa Power Systems 10
#5 Leonard E. Koffski 7
#6 Kent Douglas Gravelle 4
#7 Cory Spencer 3
#7 Lindsay Gall 3
#7 Nigel Kostiuck Talk Technologies 3
#10 Edwin M. Meade Abbott 2
#10 James Matthew KERTON 2
#10 Dimitrios Paul Marinakis Usnr 2
#10 Brett L. Tisch 2
#10 Dimitri Marinakis Led Roadway Lighting 2
#15 Doug McPhee 1
#15 Erik Quackenbush 1
#15 Randall L. Branting 1
#15 Alexander Morrison Bagnall 1
#15 Germain L. Caron IBM 1
#15 Jeffrey James Dalgliesh 1
#15 Brandon FERGUSON 1
#15 Justin Weir 1