Issued Patents All Time
Showing 1–15 of 15 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5746830 | Pneumatic granule blender for asphalt shingles | Douglas E. Boyd, Thomas D. Haubert, James S. Belt | 1998-05-05 |
| 5599581 | Method for pneumatically controlling discharge of particulate material | Douglas E. Boyd, James S. Belt | 1997-02-04 |
| 5520889 | Method for controlling the discharge of granules from a nozzle onto a coated sheet | Douglas E. Boyd, James S. Belt | 1996-05-28 |
| 5504426 | Check valve position indication system and method | Roy J. Ricci, Gary L. Hill, Rodney M. Eslinger | 1996-04-02 |
| 5377448 | Door positioning system | Douglas E. Boyd | 1995-01-03 |
| 5154080 | Integrated check valve testing system | Gary L. Hill, Steven Nafziger, John A. McMennamy | 1992-10-13 |
| 4916363 | Ballast | Larry J. Costa, Dail L. Swanson | 1990-04-10 |
| 4516699 | Automatic ladling apparatus | Peter Banovic | 1985-05-14 |
| 4417845 | Programmable positioning and operating mechanism for industrial operating head | — | 1983-11-29 |
| 4406947 | Calibrating device for ionizing radiation dosimeters | Gordon K. Riel | 1983-09-27 |
| 4330288 | Packaging machine with pouch transfer and opening mechanism | Robert C. Russell, Ronald K. Coleman, Dwain R. Schroeder | 1982-05-18 |
| 4326568 | Packaging machine with continuous motion filler | Robert C. Russell | 1982-04-27 |
| 4306400 | Packaging machine with continuous motion top sealer | Ronald K. Coleman | 1981-12-22 |
| 4299151 | Cutting mechanism for a packaging machine | — | 1981-11-10 |
| 4213646 | Radioactive source manipulator and stowage device | — | 1980-07-22 |