Tennis ball projector for training purposes
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Description
FIG. 1 is a top plan view of a tennis ball projector for training purposes embodying my new design;
FIG. 2 is a front view;
FIG. 3 is a bottom plan view;
FIG. 4 is a left side view;
FIG. 5 is a right side view;
FIG. 6 is a rear view;
FIG. 7 is a perspective view.
Referenced Cited
U.S. Patent Documents
Foreign Patent Documents
Other references
D212769 | November 1968 | Samuels |
3905349 | September 1975 | Nielson et al. |
4291665 | September 29, 1981 | Bash et al. |
2057893 | April 1981 | GBX |
- The Sporting Goods Dealer, May, 1975, p. 146, top right, Tennis Machine.
Patent History
Patent number: D269894
Type: Grant
Filed: Dec 15, 1980
Date of Patent: Jul 26, 1983
Assignee: Sony Corporation (Tokyo)
Inventors: Tsugio Hirabayashi (Tokyo), Michio Nakai (Ebina)
Primary Examiner: Melvin B. Feifer
Attorney: Lewis H. Eslinger
Application Number: 6/216,183
Type: Grant
Filed: Dec 15, 1980
Date of Patent: Jul 26, 1983
Assignee: Sony Corporation (Tokyo)
Inventors: Tsugio Hirabayashi (Tokyo), Michio Nakai (Ebina)
Primary Examiner: Melvin B. Feifer
Attorney: Lewis H. Eslinger
Application Number: 6/216,183
Classifications
Current U.S. Class:
D21/210
International Classification: D2102;
International Classification: D2102;