Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10888942 | Apparatus and method for brazing | Douglas S. Perry, William Hopper | 2021-01-12 |
| 10744582 | Apparatus and method for brazing | Douglas S. Perry, William Hopper | 2020-08-18 |
| 10058946 | Apparatus and method for brazing | Douglas S. Perry, William Hopper | 2018-08-28 |
| 9370839 | Apparatus and method for brazing | Douglas S. Perry, William Hopper | 2016-06-21 |
| 6240943 | Method and apparatus for maintaining a constant ratio of gases in a mixture subject to steady state and intermittent flow conditions | — | 2001-06-05 |
| 5507438 | Fuel gas and oxygen mixer for cutting torches | Carolyn Thomas, David W. Gailey | 1996-04-16 |
| 5407173 | Valve for gas burning torch | — | 1995-04-18 |
| 4545400 | Pressure relieving device | Arthur W. Gruber | 1985-10-08 |