Patent US2704412A successfully refreshed from Google Patents.
US4123852A
Expired / Lapsed
US
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Teaching device
Assignee: Individual
•
Filing: 1977-04-07
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Granted: 1978-11-07
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Expires: 1997-04-07
Abstract
Abstract A teaching device is disclosed which permits the utilization of both the visual and tactile senses during the learning process. The device includes a main frame, one end of which carries information conveying means consisting of a rotatable roller having removable covers attached thereto which carry raised figures or symbols such as numbers or letters, for example,. The opposed end of the frame slants away from the first end and carries a work surface suitable for writing purposes. The device also includes a support member which is essentially U-shaped in cross section and is capable of receiving the main frame on its top, whereby the overall device may be utilized as a lap desk, for example.
Inventors
- 👤 Vera Zimowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:00
CPC Classifications
G; G09; G09B; G09B19/00; G09B1/00; G09B1/02; G09B1/16; G09B1/18; G09B1/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
131 words
A teaching device comprising: (A) a frame having first and second ends; (B) an exposed information conveying roll (1) disposed adjacent said firstend of said frame transversely thereof and (2) bearing raised indicia thereon; (C) an information receiving work surface (1) disposed on said frame between said information conveying roll and said second end of said frame and (2) covering substantially all of the surface area thereof; (D) a support member having (1) opposed legs with top and bottom edges, and (2) a top transverse support element interconnecting the top edges of said legs; (E) said frame being freely received on said support element; and (F) engagement means carried by the bottom surface of said frame and the top surface of said support member, whereby relative shifting there between is prevented.
Claim 2
Dependent Claim
131 words
A teaching device comprising: (A) a frame having first and second ends; (B) an exposed information conveying roll (1) disposed adjacent said firstend of said frame transversely thereof and (2) bearing raised indicia thereon; (C) an information receiving work surface (1) disposed on said frame between said information conveying roll and said second end of said frame and (2) covering substantially all of the surface area thereof; (D) a support member having (1) opposed legs with top and bottom edges, and (2) a top transverse support element interconnecting the top edges of said legs; (E) said frame being freely received on said support element; and (F) engagement means carried by the bottom surface of said frame and the top surface of said support member, whereby relative shifting there between is prevented.
Claim 3
Dependent Claim
33 words
The device of claim 1 wherein one of said legs of said support member has an integral return leg extending along said bottom edge and from said bottom edge toward said top edge.
Claim 4
Dependent Claim
22 words
The device of claim 1 wherein one of said legs includes a horizontally disposed offset portion intermediate its top and bottom edges.
References Cited (Backward Citations)
US776355A
Cited
US1770955A
Cited
US2741869A
Cited
US3263347A
Cited
US3168061A
Cited
US3414987A
Cited
US3507056A
Cited
US3592506A
Cited
US3597854A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-06 | 1982-05-08 | 1982-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-06 | 1986-05-08 | 1986-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-06 | 1990-05-08 | 1990-11-07 | $7700.00 | Window Closed / Lapsed |