Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4231395 | Non-return valve | — | 1980-11-04 |
| 4182407 | Tube sheet comprising two interspaced sheet members and heat exchanger comprising at least one such tube sheet | Harry Lagerwerf | 1980-01-08 |