Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4819482 | Device for connecting and supporting a water-meter | Alain Rappart, Henri Loosdregt, Philippe Persohn | 1989-04-11 |
| 4798239 | Device for the protection against freezing of installations for the storage or the supply of a freezing liquid, in particular water | Philippe Persohn | 1989-01-17 |