Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5440843 | Firecode access panel | — | 1995-08-15 |
| 5433054 | Frame structures, especially for inspection and access openings in walls, roofs and ceilings | — | 1995-07-18 |
| 4669343 | Corner joint construction for mitered jambs of a frame | — | 1987-06-02 |
| 4601189 | Method of and tool for mitering frame members | — | 1986-07-22 |
| 4418746 | Plate-type heat-exchanger and manifold assembly | Gunter Langenhorst | 1983-12-06 |