Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D306189 | Flapper driven toy balloon | Robert Sheppard, John Dykstra, Grant McCune, Thomas Valentine | 1990-02-20 |
| 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 |
| 4752271 | Rubber band powered toy balloon | Robert Shepherd, John Dykstra, Grant McCune, Thomas Valentine | 1988-06-21 |