Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4407064 | Apparatus for pulling transverse fins onto a plurality of pipes | Egon Ernst, Alfred Jockel | 1983-10-04 |
| 4330934 | Apparatus for pulling transverse fins onto a plurality of pipes | Egon Ernst, Alfred Jockel | 1982-05-25 |
| 4236299 | Method and device for winding spiral fins onto oval tubing | Alfred Joekel, Hans Langen | 1980-12-02 |