Patent US3563544A successfully refreshed from Google Patents.
US3563544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable tennis instruction and practice board
Assignee: Individual
•
Filing: 1968-07-15
•
Granted: 1971-02-16
•
Expires: 1988-07-15
Abstract
Abstract A portable tennis instruction and practice apparatus having a large vertically disposed rectangular board with vertically disposed rectangularly shaped nets located along the upper and lower edges thereof, and extending above and below the respective edges thereof. The board is held in an upright position by pivotally attached column support members.
Inventors
- 👤 Andrew J Hedrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:07
CPC Classifications
A; A63; A63B; A63B63/00; A63B69/00; A63B69/0097; A63B24/00; A63B24/0021; A63B2024/0037; A63B2024/0046; A63B2024/005
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
111 words
A portable tennis instruction and practice device comprising a relatively flat body, multiple upright columns rotatably attached to said body, support means on said columns for supporting said body, each of said columns being mounted on a base, lock means on at least one of said columns to limit rotation of said column relative to said body, a first net means secured to the lower portion of said body and extending downwardly therefrom, a pair of arms swingably mounted on the upper portion of said body, means selectively securing said arms in generally upright position, and a second net means carried by said arms and having positions located above said body.
Claim 2
Dependent Claim
111 words
A portable tennis instruction and practice device comprising a relatively flat body, multiple upright columns rotatably attached to said body, support means on said columns for supporting said body, each of said columns being mounted on a base, lock means on at least one of said columns to limit rotation of said column relative to said body, a first net means secured to the lower portion of said body and extending downwardly therefrom, a pair of arms swingably mounted on the upper portion of said body, means selectively securing said arms in generally upright position, and a second net means carried by said arms and having positions located above said body.
Claim 3
Dependent Claim
145 words
A portable tennis instruction and practice board for use by one or more persons comprising a relatively flat body having front and rear surfaces and disposed in a substantially vertical plane when in use, spaced upright columns rotatably attached to the rear surface of said body, each of said columns being fixed on an elongated base member, said columns being rotatable to move said base members from a plane generally perpendicular to said body to a plane generally parallel with said body, means for selectively fastening said rotatable columns in fixed position relative to said body in at least said perpendicular plane, a first net means mounted on the front surface of said body and extending downwardly substantially to said base members, collapsible means carried by said body and extending upwardly therefrom, and a second net means attached to said collapsible means above said body.
Claim 4
Dependent Claim
145 words
A portable tennis instruction and practice board for use by one or more persons comprising a relatively flat body having front and rear surfaces and disposed in a substantially vertical plane when in use, spaced upright columns rotatably attached to the rear surface of said body, each of said columns being fixed on an elongated base member, said columns being rotatable to move said base members from a plane generally perpendicular to said body to a plane generally parallel with said body, means for selectively fastening said rotatable columns in fixed position relative to said body in at least said perpendicular plane, a first net means mounted on the front surface of said body and extending downwardly substantially to said base members, collapsible means carried by said body and extending upwardly therefrom, and a second net means attached to said collapsible means above said body.
Claim 5
Dependent Claim
24 words
The structure of claim 2 in which said means for fastening said columns includes an elongated pin selectively extending through openings in said columns.
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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |