Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4845632 | Electonic postage meter system having arrangement for rapid storage of critical postage accounting data in plural nonvolatile memories | Paul C. Kroll | 1989-07-04 |
| 4817004 | Electronic postage meter operating system | Paul C. Kroll | 1989-03-28 |
| 4805109 | Nonvolatile memory protection arrangement for electronic postage meter system having plural nonvolatile memories | Paul C. Kroll | 1989-02-14 |