Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4257150 | Apparatus for assembling wall modules from a pair of stretched sheets of metal laterally spaced apart by a skeletal frame | George R. Heffner | 1981-03-24 |
| 4257158 | Bus suspension mating fixture assembly | George R. Heffner | 1981-03-24 |
| 4231556 | Apparatus for holding hollow wall panels while they are filled with foamed plastic | George R. Heffner | 1980-11-04 |