Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4829196 | Energy-saving pressure reducer | Gerard L. Lehman | 1989-05-09 |
| 4801811 | Method of and means for generating electricity in an arid environment using elongated open or enclosed ducts | Gad Assaf | 1989-01-31 |