Mathematic teaching rack
Description
FIG. 1 is a front elevational view of the mathematic teaching rack showing my new design;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is a frontn perspective view thereof.
The broken lines shown in FIGS. 5 and 7 are for illustrative purposes only and form no part of the claimed design.
Referenced Cited
U.S. Patent Documents
D149083 | March 1948 | Mooney |
D169562 | May 1953 | Rieck |
D184042 | December 1958 | Dochterman et al. |
D300040 | February 28, 1989 | Dermody |
3455034 | July 1969 | Schott |
3811205 | May 1974 | Pitzler |
3995378 | December 7, 1976 | Darnell |
4233757 | November 18, 1980 | Narcise |
4812124 | March 14, 1989 | Colodner et al. |
4884973 | December 5, 1989 | Pak |
5205747 | April 27, 1993 | Tan |
Patent History
Patent number: D373144
Type: Grant
Filed: Jun 6, 1994
Date of Patent: Aug 27, 1996
Inventor: Alice M. Hansen (El Cajon, CA)
Primary Examiner: Susan J. Lucas
Assistant Examiner: Pamela Burgess
Application Number: 0/23,997
Type: Grant
Filed: Jun 6, 1994
Date of Patent: Aug 27, 1996
Inventor: Alice M. Hansen (El Cajon, CA)
Primary Examiner: Susan J. Lucas
Assistant Examiner: Pamela Burgess
Application Number: 0/23,997
Classifications
Current U.S. Class:
Demonstrator Or Exhibitor (10) (D19/62)