Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D426569 | Hand stamp | David A. Mayer, Michael P. Zambelli | 2000-06-13 |
| D413619 | Case for a self-inking stamp | David A. Mayer | 1999-09-07 |
| D406834 | Communication handset | Elisa Hawkins Metzcus, Chuck Williamson, Paul A. Scheib, Steven G. Miggles | 1999-03-16 |
| D367292 | Hand stamp handle | David A. Reid | 1996-02-20 |
| D367290 | Self-inking stamp | Steven J. Sculler, David A. Reid | 1996-02-20 |
| D365821 | Personal information center telephone set | Harold D. Bales, John A. Karpicke, David A. Reid, Paul J. Straub, Michael P. Zambelli | 1996-01-02 |
| D355186 | Telephone answering machine | David C. Danielson | 1995-02-07 |
| D355187 | Telephone answering machine | David C. Danielson | 1995-02-07 |
| D345976 | Telephone base | Anthony J. Grewe, William J. McLaughlin, Michael P. Zambelli, Robert S. Zieles | 1994-04-12 |
| D305888 | Portable radiotelephone unit | Ernest M. Bevilacqua, Nathan D. Ehrlich, Henry G. Grilk, Wen-Jeng Li, Arthur B. Nichols | 1990-02-06 |