Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4867111 | Arrangement for the actuation of a gas-exchange disk valve | Hans-Joachim Esch, Van-Khanh Tran | 1989-09-19 |
| 4834590 | Apparatus and process for pneumatically conveying material in dust or finely particulate form | Klaus-Dieter Osenberg, Klaus Heinrich | 1989-05-30 |