Title:
Mathematics teaching aid
United States Patent D297437


Inventors:
Mortensen, Vernon J. (Coeur d'Alene, ID)
Application Number:
06/763671
Publication Date:
08/30/1988
Filing Date:
08/08/1985
Assignee:
Mortensen Educational Products, Inc. (Hayden Lake, ID)
Primary Class:
Other Classes:
D19/60
Field of Search:
D19/59-62, D19/64, D19/99, 434/195, 434/210, 434/202
View Patent Images:
US Patent References:
3908287Mathematics visual teaching aidSeptember, 1975Darnell434/210
D158481N/AMay, 1950LugarD19/59
1471437Primary educational applianceOctober, 1923Wood434/195



Primary Examiner:
Zarfas, Louis S.
Assistant Examiner:
Shooman, Theodore M.
Attorney, Agent or Firm:
Wells, St. John & Roberts
Claims:
1. The ornamental design for mathematics teaching aid, as shown and described.

Description:

FIG. 1 is a top, front and left side perspective view of a mathematics teaching aid showing my new design;

FIG. 2 is an enlarged fragmentary front elevational view thereof, shown with the transparent cover removed and illustrating the indicia which is omitted from FIGS. 1, 3 and 5 for ease of illustration;

FIG. 3 is a top, front and left side perspective view thereof, shown with the cover pivoted rearwardly;

FIG. 4 is a left side elevational view thereof, the right side being a mirror image;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a top plan view thereof;

FIG. 8 is a reduced scale bottom plan view thereof;

FIG. 9 is a reduced scale left side elevational view thereof, shown with the cover pivoted rearwardly;

FIG. 10 is a reduced scale left side elevational view thereof, shown with the cover removed;

FIG. 11 is a front elevational view thereof, shown with the cover and bars removed for clarity of illustration;

FIG. 12 is a rear elevational view thereof, shown with the cover and bars removed for clarity of illustration; and

FIG. 13 is a top plan view thereof, shown with the cover and bars removed for clarity of illustration.