Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889423 | Conversion of high to low frame rate motion picture films | — | 1989-12-26 |
| 4874162 | Motion picture amusement ride | David L. Collins, Wayne Tracy Smith, Robert Spieldiener | 1989-10-17 |
| 4798376 | Amusement ride apparatus with a plurality of individually tiltable frames | David L. Collins, Wayne Tracy Smith, Robert Spieldiener | 1989-01-17 |