Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6171435 | Method of installing pipes | William E. Robinson | 2001-01-09 |
| 5971404 | Self-centering suspension for in-pipe use | — | 1999-10-26 |
| 5951221 | Apparatus for in-pipe use | — | 1999-09-14 |
| 5580589 | Apparatus for bending plastic pipe | William E. Robinson | 1996-12-03 |
| D284498 | Gas governor module | John E. Hatley | 1986-07-01 |
| 4473091 | Fluid flow control valves | — | 1984-09-25 |
| 4465202 | Fluid container with venting means | John E. Hatley | 1984-08-14 |
| 4311167 | Regulator installation for fluid transmission or distribution systems | Roger W. Hawkins, Arthur B. Smelt | 1982-01-19 |