Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4592474 | Coupling and latching mechanism for extensible boom | — | 1986-06-03 |
| 4585132 | Extensible boom with manual section stored in base | Thomas Volkman | 1986-04-29 |
| 4557391 | Method of controlling the angle of a pivotal boom with extensible sections | Darwin N. Poock | 1985-12-10 |
| 4514939 | Extensible boom with manual section stored in base | Thomas J. Volkmann | 1985-05-07 |
| 4492311 | Coupling and latching mechanism for extensible boom | — | 1985-01-08 |
| 4491228 | Floating sheave type pendant pay-out system for pendant supported boom | Darwin N. Poock | 1985-01-01 |