Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874162 | Motion picture amusement ride | Douglas Trumbull, David L. Collins, Robert Spieldiener | 1989-10-17 |
| 4798376 | Amusement ride apparatus with a plurality of individually tiltable frames | Douglas Trumbull, David L. Collins, Robert Spieldiener | 1989-01-17 |