United States Patent 3468535
Inventors:
Obst, Hermann Valentin
Publication Date:
09/23/1969
Assignee:
Hermann, Valentin Obst
Other Classes:
340/323R, 473/192, 273/127R, 473/101, 273/338, 273/374, 248/188.400, 273/371
International Classes:
A63B63/00; A63B67/00; A63D3/00; A63F7/00; A63F9/02; A63H33/00; A63B71/06
US Patent References:
| 2830819 | Movable ball bumper | | | |
| 3083966 | Foul detecting and indicating mechanism | | | |
| 3193818 | Method and apparatus for reading targets | | | |
| 3338579 | Game apparatus for entrapping a ball | | | |