Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7567660 | Message pad subsystem for a software-based intercom system | Marc Lemchen | 2009-07-28 |
| 6937712 | Network-based intercom system and method for simulating a hardware based dedicated intercom system | Marc Lemchen | 2005-08-30 |
| 6792091 | Network-based intercom system and method for simulating a hardware based dedicated intercom system | Marc Lemchen | 2004-09-14 |