Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D301347 | Propeller driven toy balloon | Robert Sheppard, John Dykstra, Grant McCune, Thomas Valentine | 1989-05-30 |
| D301257 | Propeller driven toy balloon | Robert Sheppard, John Dykstra, Grant McCune, Thomas Valentine | 1989-05-23 |