Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4542707 | Sewing machine having auxiliary work turning needle | Walter Hager | 1985-09-24 |
| 4542790 | Process for extracting extensively emulsion-free oil from a subterranean reservoir | — | 1985-09-24 |
| 4485873 | Process for oil recovery from a subterranean reservoir | Kurt Kosswig | 1984-12-04 |
| 4478281 | Process for extracting oil from a subterranean reservoir | Kurt Kosswig | 1984-10-23 |
| 4457373 | Process for oil recovery from subterranean deposits by emulsion flooding | Kurt Kosswig | 1984-07-03 |
| 4305917 | Method for preparing ammonia and hydrogen chloride from ammonium chloride | Alfred Coenen, Kurt Kosswig | 1981-12-15 |