Portable teaching aid
Prall August 28, 1
U.S. patent number D252,758 [Application Number 05/793,162] was granted by the patent office on 1979-08-28 for portable teaching aid. Invention is credited to Lester E. Prall.
| United States Patent | D252,758 |
| Prall | August 28, 1979 |
Portable teaching aid
Claims
The ornamental design for a portable teaching aid, substantially as shown.
| Inventors: | Prall; Lester E. (Salt Lake City, UT) |
|---|---|
| Appl. No.: | 05/793,162 |
| Filed: | May 2, 1977 |
| Current U.S. Class: | D19/62; D19/114 |
| Current International Class: | D1907 |
| Field of Search: | ;D19/59,62,52 ;35/60,64,61 ;D34/15LL,15R ;46/13 |
References Cited [Referenced By]
U.S. Patent Documents
| 3345760 | October 1967 | Myhr |
| 60727 | Mar 1943 | DK | |||
| 458623 | Jul 1950 | IT | |||
Attorney, Agent or Firm: Moore; W. Britton
Description
FIG. 1 is a front perspective view of a portable teaching aid showing my new design in operating open or expanded position;
FIG. 2 is a side elevation view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a view in elevation of the opposite side of FIG. 1; and
FIG. 5 is a perspective view of the teaching aid in closed position.
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