Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4579004 | Instrument for detecting the instant at which a crack begins in a mechanical strength test of a ferromagnetic metal | Siegfried Winkler | 1986-04-01 |
| 4418563 | Method of determining the impact fracture toughness K.sub.ID by means of impact tests | Siegfried Winkler | 1983-12-06 |