Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7107754 | Chain in particular a hoist chain | Hans Dalferth, Uwe Wistuba, Heribert Herzog | 2006-09-19 |
| 6925794 | Chain, chain wheel and chain transmission for lifting gear | Hans Dalferth | 2005-08-09 |