Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4468907 | Device for protecting steel reinforcements for concrete as well as a method and device for producing them | Hellmuth Feldmann | 1984-09-04 |
| 4325533 | Housing device for isolating connecting reinforcements at joints between first and subsequently poured concrete structures | Hellmuth Feldmann | 1982-04-20 |