Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4823042 | Sonic transducer and method for making the same | Kenneth W. Coffey | 1989-04-18 |
| D299747 | Electrotherapy treatment cabinet | John H. Wilson, Kenneth W. Coffey, David Hugh Richards, Maqsood Mohd, Lee Cody | 1989-02-07 |