Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8528459 | Cushioning system for pneumatic cylinder of differential engine | — | 2013-09-10 |
| 8291644 | Locking mechanism for pneumatic differential engine for power-operated doors | Frank Golemis, Michael O'Neill, David C. Griffis, Peter Heidrich | 2012-10-23 |
| 8171672 | Output shaft, teeter lever and pinion gear arrangement for pneumatic differential engine | David C. Griffis, Michael O'Neill | 2012-05-08 |
| 8147158 | Travel multiplier mechanisms for writing instruments | Nicholas M. Nanos, Neville Andrews, Andrew Bielecki | 2012-04-03 |
| 7891897 | Travel multiplier mechanisms for writing instruments | Nicholas M. Nanos, Andrew Bielecki, Neville Andrews | 2011-02-22 |
| 5818599 | Apparatus and method for accelerated testing of materials | Richard Schultz | 1998-10-06 |
| 5601130 | Shutter blade, assembly and method | Robert I. Werner, Eric C. Horne, Fred L. Murrin | 1997-02-11 |