Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8468757 | Photovoltaic roofing systems and methods for installing them | Stephen A. Koch, Wayne E. Shaw, Gregory F. Jacobs, Paul J. Batt | 2013-06-25 |
| 8209920 | Photovoltaic roofing systems and methods for installing them | Stephen A. Koch, Wayne E. Shaw, Gregory F. Jacobs, Paul J. Batt | 2012-07-03 |
| D611620 | Shingle | Husnu M. Kalkanoglu, Robert L. Jenkins, Joseph Quaranta, Kermit E. Stahl, Stephen A. Koch | 2010-03-09 |
| 7510622 | Method of making a shingle and shingle made thereby | Husnu M. Kalkanoglu, Robert L. Jenkins, Joseph Quaranta, Kermit E. Stahl | 2009-03-31 |
| D552267 | Shingle | Husnu M. Kalkanoglu, Robert L. Jenkins, Joseph Quaranta, Kermit E. Stahl, Stephen A. Koch | 2007-10-02 |
| 4617638 | Method and system for determining mass temperature in a hostile environment | Thomas Pfeiffer, Vincent Victor Horvath | 1986-10-14 |
| 4435093 | Pyrometer with sighting window cleanliness monitor | Thomas Pfeiffer, Vincent Victor Horvath | 1984-03-06 |