US3180643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tennis training apparatus
Assignee: Individual
•
Filing: 1961-11-08
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Granted: 1965-04-27
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Expires: 1981-11-08
Abstract
Abstract 890,352. Tennis practising appliances. KALLAI, O. Nov. 15, 1960, No. 39224/60. Class 132(2) Tennis training apparatus has an adjustable ball returning surface 4 provided with a movable horizontal strip 6 to which a bell 9 is connected by cords, the strip 6 being mounted at a height corresponding to the upper side of a tennis net so that balls played correctly are not returned by surface 4 but pass through an opening therein,the bell 9 signalling such a stroke. A stop net 12 and catching net 10 lead balls back to the player and the apparatus is adjustably mounted on stands 1 by a shaft 2.
Inventors
- 👤 Kallai Oskar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:11
CPC Classifications
A; A63; A63B; A63B69/00; A63B69/0097; A63B63/00; A63B24/00; A63B24/0021; A63B2024/0037; A63B2024/0046; A63B2024/005
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
60 words
A TENNIS TRAINING APPARATUS COMPRISING A BALL RETURNING MEMBER HAVING A BALL RETURNING SURFACE THEREON, A BALL CATCHING MEMBER POSITIONED BEHIND AND SECURED TO SAID BALL RETURNING MEMBER, SAID BALL CATCHING MEMBER OPENING TOWARD THE DIRECTION FROM WHICH BALLS ARE INTENDED TO BE DRIVEN AGAINST THE BALL RETURNING SURFACE AND HAVING A BALL CATCHING SURFACE WITH A LOWER PORTION EX-
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-26 | 1968-10-26 | 1969-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-26 | 1972-10-26 | 1973-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-26 | 1976-10-26 | 1977-04-27 | $7700.00 | Window Closed / Lapsed |