Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6292991 | Apparatus and method for inserting corner members in channel-shaped flanges of a duct | Herbert Fischer | 2001-09-25 |
| 6263557 | Apparatus and method for inserting angle plates in channel shaped flanges of a duct | Aleksandr Karpman, Herbert Fischer | 2001-07-24 |
| 6081985 | Method of inserting corner members in channel-shaped flanges of a duct | Herbert Fischer | 2000-07-04 |
| 6047466 | Apparatus and method for inserting angle plates in channel shaped flanges of a duct | Aleksandr Karpman, Herbert Fischer | 2000-04-11 |