Issued Patents All Time
Showing 51–67 of 67 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4502821 | Thread cutting tool | — | 1985-03-05 |
| 4497100 | Apparatus for working pipes | — | 1985-02-05 |
| 4490487 | SO.sub.3 /Imide adducts, process for their preparation and their use as sulphonating agents | Kurt Halcour, Peter M. Lange | 1984-12-25 |
| 4487305 | Apparatus, especially portable apparatus, for handling tubular- and/or rod-shaped workpieces or the like | — | 1984-12-11 |
| 4398042 | Process for the production of 3-mercapto-propanediol-(1,2) | Axel Kleemann, Robert Nygren | 1983-08-09 |
| 4390732 | Process for the production of guaiacol glycerine ether | Wolfgang Merk, Peter Werle, Robert Nygren | 1983-06-28 |
| 4370770 | Cutting head for thread cutting machines | — | 1983-02-01 |
| 4360697 | Process for the production of 1-amino-propanediol-2,3 | Axel Kleemann, Robert Nygren | 1982-11-23 |
| 4358615 | Process for the production of 1-amino-propanediol-(2,3) (II) | Axel Kleemann, Robert Nygren | 1982-11-09 |
| 4356323 | Process for the production of 1-amino-propanediol-(2,3) (I) | Axel Kleemann, Robert Nygren | 1982-10-26 |
| 4353154 | Apparatus for working pipes | — | 1982-10-12 |
| 4308768 | Ratchet lever | — | 1982-01-05 |
| 4282618 | Die for cutting screw-threads | — | 1981-08-11 |
| 4247124 | Chuck | — | 1981-01-27 |
| 4213722 | Transportable external thread cutting machine | — | 1980-07-22 |
| 4213723 | Thread cutting die stock | — | 1980-07-22 |
| 4207657 | Separating device for bar and pipe-shaped workpieces | — | 1980-06-17 |