Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5981050 | Composite shape forming structure for sealing and reinforcing concrete and method for making same | Charles Robert Kaempen | 1999-11-09 |
| 5742992 | Method for making composite double-wall underground tank structure | — | 1998-04-28 |
| 5590803 | Composite double-wall underground tank structure and method for making same | — | 1997-01-07 |
| 5222769 | Double-wall composite pipe and coupling structure assembly | — | 1993-06-29 |
| 4786536 | Composite deflectable spring structure | — | 1988-11-22 |
| 4775563 | Composite spring-lock coupling | — | 1988-10-04 |
| 4762583 | Method for making composite twine structures | — | 1988-08-09 |
| 4758024 | Composite flanged coupling structure | — | 1988-07-19 |
| 4757658 | Panel structure with composite coupling | — | 1988-07-19 |
| 4740422 | Multiple composite twine structure | — | 1988-04-26 |
| 4680923 | Composite twine structure | — | 1987-07-21 |
| 4385644 | Composite laminate joint structure and method and apparatus for making same | — | 1983-05-31 |