Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7644499 | Protective sleeve cover for printing roll | Mark Charles Davis | 2010-01-12 |
| 6640711 | Bridge mandrel for use as a repeat builder in a printing machine | Gregory J. Gayle, Michael McGuinness | 2003-11-04 |
| 4842620 | Process of gas enrichment with porous siliceous-containing material | Joseph J. Hammel, Walter J. Robertson, William P. Marshall, Herbert W. Barch, Balbhadra Daas +1 more | 1989-06-27 |
| 4690760 | Novel cartridge with stress relieving member | Herbert W. Barch, Balbhadra Das | 1987-09-01 |
| 4689255 | Mat structure | Herbert W. Barch, Balbhadra Das | 1987-08-25 |