Patent US4249729A successfully refreshed from Google Patents.
US4249729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tennis exercise aid
Assignee: Individual
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Filing: 1979-12-17
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Granted: 1981-02-10
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Expires: 1999-12-17
Abstract
Abstract Tennis exercise aid comprises a tight wound tension spring having a manual handle at each end. One manual handle is in the form of a tennis racket handle, and the other is a resilient foam-covered tennis racket handle. The one manual handle is covered with a material different from the resilient foam-covered other handle.
Inventors
- 👤 Pericles Gabrielidis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:11
CPC Classifications
A; A63; A63B; A63B21/00; A63B21/0004; A63B21/00043; A63B21/02; A63B21/045; A63B69/00; A63B69/38; A63B15/00; A63B21/023
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
108 words
A tennis exercise aid comprising: a tight wound tension spring having first and second ends; first and second manually graspable handles respectively secured to said first and second ends of said spring, said first handle being configured to be used as a standard tennis racquet handle and being substantially octagonal in cross section, a high friction covering on said first handle, said second handle having a core of rigid material having a substantially octagonal cross-sectional configuration and having a covering material thereon different from said covering on said first handle, said covering material comprising a resilient foam so that said second handle requires a firm manual grasp thereon.
Claim 2
Dependent Claim
108 words
A tennis exercise aid comprising: a tight wound tension spring having first and second ends; first and second manually graspable handles respectively secured to said first and second ends of said spring, said first handle being configured to be used as a standard tennis racquet handle and being substantially octagonal in cross section, a high friction covering on said first handle, said second handle having a core of rigid material having a substantially octagonal cross-sectional configuration and having a covering material thereon different from said covering on said first handle, said covering material comprising a resilient foam so that said second handle requires a firm manual grasp thereon.
Claim 3
Dependent Claim
30 words
The tennis exercise aid of claim 1 wherein a sleeve engages over a portion of said spring onto a portion of one of said handles to form a transition therebetween.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-10 | 1984-08-11 | 1985-02-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-10 | 1988-08-11 | 1989-02-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-10 | 1992-08-11 | 1993-02-10 | $7700.00 | Window Closed / Lapsed |