Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D703464 | Towel clip | — | 2014-04-29 |
| 6041813 | Manually actuated diaphragm valve with lockout feature for open and closed positions | Andrew Dougherty, Brian K. Sprafka | 2000-03-28 |
| 5462081 | Excess flow valve | Robert V. Perusek, Gregory S. Kalata | 1995-10-31 |
| 4671308 | Fire-safe ball valve | Peter C. Williams, Timothy J. Francis | 1987-06-09 |
| 4602762 | Ball valve and seat assembly | Peter C. Williams | 1986-07-29 |
| 4572239 | High pressure ball valve | Peter C. Williams, Gilbert Lutz | 1986-02-25 |
| 4558874 | Valve stem packing assembly | Peter C. Williams, Edward M. Yusko, Jr., Thomas M. Mannion | 1985-12-17 |
| 4538790 | Valve stem packing assembly | Peter C. Williams, Edward M. Yusko, Jr., Thomas M. Mannion | 1985-09-03 |
| 4486123 | Underwater pipe laying vessel | Peter Plotz, Dieter Konig, Jochen Langer, Burkhardt Switaiski, H. Heinrich Schindler +1 more | 1984-12-04 |
| 4479513 | High pressure ball valve | Peter C. Williams, Gilbert Lutz | 1984-10-30 |
| 4421293 | End cap assembly | Gerald A. Babuder | 1983-12-20 |
| 4410165 | Ball valve and seat assembly | Peter C. Williams | 1983-10-18 |