Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
CB

Charles E. Barker — 8 Patents

RCRobertshaw Controls: 5 patents #48 of 302Top 20%
Motorola: 2 patents #4,475 of 12,470Top 40%
UEUS Dept of Energy: 1 patents #1,355 of 5,099Top 30%
Holland, MI: #192 of 1,299 inventorsTop 15%
Michigan: #11,873 of 86,293 inventorsTop 15%
Overall (All Time): #670,061 of 4,157,543Top 20%
8 Patents All Time

Issued Patents All Time

Showing 1–8 of 8 patents

Patent #TitleCo-InventorsDate
5264959 Temperature-insensitive phase-matched optical harmonic conversion crystal David Eimerl, Stephan P. Velsko, David Roberts 1993-11-23
4563751 Carry propagate adder circuit which differentially senses a carry input 1986-01-07
4460125 Wall thermostat and the like Anthony C. Cairo, Frederick T. Bauer 1984-07-17
4410813 High speed CMOS comparator circuit Michael D. Smith 1983-10-18
4373664 Wall thermostat and the like Anthony C. Cairo, Frederick T. Bauer, Auzville Jackson, Jr. 1983-02-15
4319711 Wall thermostat and the like Anthony C. Cairo, Frederick T. Bauer, Auzville Jackson, Jr. 1982-03-16
4228346 Self-calibrating electric clock circuit 1980-10-14
4220840 Pulsing probe for microwave oven 1980-09-02