Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE36062 | Steam sterilization indicator | Irving A. Speelman, Kenneth A. Summer, Seymour Schuman | 1999-01-26 |
| D347585 | Steam sterilization monitor | Ken Summer, Peter Hunsinger, Irving A. Speelman | 1994-06-07 |
| 5158363 | Steam sterilization indicator | Irving A. Speelman, Ken Summer | 1992-10-27 |