Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5278939 | Vacuum-molded ceramic fiber electric radiant heating unit with resistance heating coils internally free of fibers | Josef Boes | 1994-01-11 |
| 4617450 | Process for manufacture of a vacuum-moulded electrical heating unit | Josef Boes | 1986-10-14 |