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

Siebolt Hettinga — 36 Patents

CICentral Quality Industries: 1 patents #2 of 3Top 70%
Des Moines, IA: #10 of 657 inventorsTop 2%
Iowa: #204 of 15,303 inventorsTop 2%
Overall (All Time): #95,138 of 4,157,543Top 3%
36 Patents All Time

Issued Patents All Time

Showing 26–36 of 36 patents

Patent #TitleCo-InventorsDate
5275764 Method of molding a vehicle lamp assembly 1994-01-04
5151237 Method of injection molding a flat deformable laminate 1992-09-29
5139714 Process for injection molding a hollow plastic article 1992-08-18
5110532 Method for molding a laminate 1992-05-05
4743323 Method of molding a composite article 1988-05-10
4613475 Clamping structure and method for clamping the mold unit of a mold injection apparatus 1986-09-23
D282847 Tilt and rotate base for a display monitor 1986-03-04
4397806 Method and apparatus for mold injection 1983-08-09
4350193 Power tool accessory table James E. McCambridge 1982-09-21
4307057 Method for aligning an injection mold with a nozzle at the mold injection station 1981-12-22
4286731 Soap leaf sheet dispenser 1981-09-01