United States Patent 2805070
Inventors:
Waters, Joseph L.
Publication Date:
09/03/1957
Assignee:
Waters, Joseph L.
Other Classes:
273/394, 473/197
International Classes:
A63B47/02; A63B63/00; A63B47/00
US Patent References:
| 2657058 | Pitcher's control target with automatic ball return | | | |