Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7797116 | System and method of acoustic detection and location of fire sprinkler water discharge | Andrew G. Berezowski, Walter Heimerdinger, John Phelps, Michael D. Shields, Philip Zumsteg | 2010-09-14 |
| 7702112 | Intelligibility measurement of audio announcement systems | Philip Zumsteg, Andrew G. Berezowski, Walter Heimerdinger, John Phelps | 2010-04-20 |
| 7639147 | System and method of acoustic detection and location of audible alarm devices | Andrew G. Berezowski, Walter Heimerdinger, John Phelps, D. Michael Shields, Philip Zumsteg | 2009-12-29 |
| 7433821 | Methods and systems for intelligibility measurement of audio announcement systems | Philip Zumsteg, Andrew G. Berezowski, Walter Heimerdinger, John Phelps, D. Michael Shields | 2008-10-07 |