Title: Teaching aid for mathematics and number systems

Abstract: An educational system for teaching or aiding in the teaching of mathematics and number systems, and numerical and dimensional relationships comprises a base member having a plurality of parallel extending tracks, each track divided into different units of one or more number systems, such as metric system and the English measurement systems. The divisions of the respective tracks are both visual and tactual and a plurality of different indicators are available for indicating points or numerical values on the various scales. A plurality of dimensioned blocks of the various dimensions utilized in the system are provided for manipulation in conjunction with the various tracks for not only visual but tactual sensing of numerical values, dimensions and relative values.

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Inventors: Dumovich, Matt J. (San Diego, CA, US)

Application Number: 838076
Filing Date: 1977-09-30
Publication_date: 1979-03-20
Assignee:
Primary Class(es): 434/187 434/195
Other Classes:
US Patent Ref:

356167	Jan, 1887	Shannon	35/31.
2482658	Sep, 1949	Culp	35/31.
2494469	Jan, 1950	Booth	35/31.
2835988	May, 1958	Hilkene	35/31.
2926432	Mar, 1960	Helberg	35/31.
3002295	Oct, 1961	Armstrong	35/70.
3229388	Jan, 1966	Smith	35/70.
3248804	May, 1966	Jorgens	35/31.
3410002	Nov, 1968	Mulholland et al.	35/31.
3414986	Dec, 1968	Stassen	35/70.
3708892	Jan, 1973	Graf	35/31.
3760165	Sep, 1973	Marcks	35/31.

Other Refs: 72575510424041226055

Feb, 1932	FR
Jun, 1953	FR
Mar, 1971	GB

Primary Examiner: Grieb, William H.
Assistant Examiner:
Attorney: Brown & Martin