Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4330798 | Electronic stencil cutter | Arthur J. Heyer, Edward M. Springer | 1982-05-18 |
| 4319253 | Electronic stencil cutter | Arthur J. Heyer, Edward M. Springer | 1982-03-09 |
| 4268869 | Electronic stencil cutter having means to vary size of reproduced picture | Arthur J. Heyer, Edward M. Springer | 1981-05-19 |