Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4615554 | Screw-in fastener for a tubular anchor embedded in a concrete element | Ernst Hatz, Eckart Zipf | 1986-10-07 |
| 4398762 | Pickup device for lifting concrete body | Ernst Haeussler, Ernst Hatz, Olle Malmen, Karl E. Schlick | 1983-08-16 |