Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6879848 | Method and apparatus for alerting an operator of an incoming cellular or portable phone call | — | 2005-04-12 |
| 6532292 | Method and apparatus to transmit audio into the human ear | — | 2003-03-11 |
| 6240176 | Method to alert a phone operator by magnetic means of an incoming call | — | 2001-05-29 |
| 6236868 | Apparatus for sensing the presence of a mobile telephone in its holder | — | 2001-05-22 |
| 6111948 | Dialer for selecting a character | — | 2000-08-29 |
| 4636999 | Magnetostrictive pulse generator | — | 1987-01-13 |
| 4571693 | Acoustic device for measuring fluid properties | James R. Birchak | 1986-02-18 |