Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7520573 | Shadow zone fault detection | Scott E. Carpenter, Eugen Goebel, Ingo Alfter | 2009-04-21 |
| D265578 | Children's play sprinkler | Douglas A. Geller, David C. McElroy | 1982-07-27 |
| 4334385 | Flying disc | Arthur K. Melin, Douglas A. Geller | 1982-06-15 |
| 4273418 | Mirror for producing optical illusions | Douglas A. Geller | 1981-06-16 |
| D259335 | Combined packaging container and target for an air gun | — | 1981-05-26 |
| 4235378 | Water play toy | Arthur K. Melin, Darle L. Kerkenbush, Jim L. Whittington, Douglas A. Geller | 1980-11-25 |