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

Michael D. Robertson — 4 Patents

CACarpco: 2 patents #5 of 16Top 35%
RDRanco Electronics Division: 1 patents #3 of 9Top 35%
Pieter Appelplein, TX: #16 of 138 inventorsTop 15%
Texas: #33,546 of 125,132 inventorsTop 30%
Overall (All Time): #1,293,197 of 4,157,543Top 35%
4 Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
5452805 Spiral separator Frank S. Knoll 1995-09-26
5184731 Spiral separator with improved separation surface Robert M. Carver 1993-02-09
4616485 Temperature controller for an air conditioning apparatus Jimmie D. Gillett, Ronald E. Ellis 1986-10-14
4255623 Apparatus for pulse train measurement Larry A. Barnes, Daniel Thomas Daugherty, Michael Flynn, Kenneth R. Welch 1981-03-10