Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6697471 | Extension phone off-hook check for Type 2 Caller ID reception in a telephone adjunct device | Watson Yuet Lai Chan, David Brewster, John Justin Caffrey | 2004-02-24 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6697471 | Extension phone off-hook check for Type 2 Caller ID reception in a telephone adjunct device | Watson Yuet Lai Chan, David Brewster, John Justin Caffrey | 2004-02-24 |