Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7957771 | Hands-free conferencing apparatus and method for use with a wireless telephone | Melvin D. Frerking, Tamara Kimble, Christopher Penrose | 2011-06-07 |
| 7719228 | Portable battery recharge station for secondary batteries | Melvin D. Frerking, John Keith Parker | 2010-05-18 |
| 7405535 | Portable battery recharge station | Melvin D. Frerking, John Keith Parker | 2008-07-29 |
| 6624616 | Portable battery recharge station | Melvin D. Frerking, John Keith Parker | 2003-09-23 |
| 6441589 | Portable battery recharge station | Melvin D. Frerking, John Keith Parker | 2002-08-27 |