CH

Charles W. Harpold

HP Harco Graphic Products: 9 patents #1 of 4Top 25%
📍 Grand Rapids, MI: #164 of 1,824 inventorsTop 9%
🗺 Michigan: #8,484 of 86,293 inventorsTop 10%
Overall (All Time): #474,243 of 4,157,543Top 15%
11
Patents All Time

Issued Patents All Time

Showing 1–11 of 11 patents

Patent #TitleCo-InventorsDate
5407097 Method and apparatus for handling printing ink 1995-04-18
5275100 Method and apparatus for handling printing ink Eugene H. Kemp 1994-01-04
5170710 Method and apparatus for handling printing ink Eugene H. Kemp 1992-12-15
5020430 Printer James E. Belcher 1991-06-04
4920878 Screen printer with plater sifting structure James E. Belcher 1990-05-01
4826539 Cleaning apparatus and method 1989-05-02
4817523 Flat bed screen printing press James E. Belcher 1989-04-04
4809604 Machine for screen printing numbers 1989-03-07
4750608 Belt tracking system for screen printing conveyor driers 1988-06-14
4381706 Printing screen and method 1983-05-03
4351238 Method for screen printing 1982-09-28