Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886433 | Displacement machine having spiral chamber and displacement member of increasing radial widths | — | 1989-12-12 |
| 4872712 | Flange connection | — | 1989-10-10 |
| 4850601 | Seal | Nikolay Vlaykowski | 1989-07-25 |
| 4836583 | Pipe connection for instruments or machines | Nikolay Vlaykowski | 1989-06-06 |
| 4807912 | Pipe coupling | — | 1989-02-28 |