Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 4570912 | Pneumatic spring counterbalance having improved damping structure | George C. Ludwig | 1986-02-18 | $170,000 |
| 4408751 | Multi-chamber temperature compensated pneumatic counterbalance | George C. Ludwig | 1983-10-11 | $140,000 |
| 4192788 | Modified polyethylene containing hot-melt adhesives useful for carpet tape | — | 1980-03-11 | $4,603,000 |