Teaching tool

Skip to: Description  ·  References Cited  · Patent History  ·  Patent History
Description

FIG. 1 is a perspective view of a teaching tool showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and

FIG. 7 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
D250201 November 7, 1978 Pierce
D266992 November 23, 1982 Powell
D271566 November 29, 1983 Powell
D315733 March 26, 1991 Shimasaki
D359240 June 13, 1995 Benton
1087207 February 1914 Austin
4725061 February 16, 1988 Cross
5022016 June 4, 1991 Smith et al.
Patent History
Patent number: D398645
Type: Grant
Filed: Jan 16, 1998
Date of Patent: Sep 22, 1998
Inventor: Chin-Chen Tsao (Chung Shan District, Taipei)
Primary Examiner: Martie K. Holtje
Law Firm: Rosenberg, Klein & Bilker
Application Number: 0/82,208
Classifications
Current U.S. Class: Movable Indicator Or Changeable Exhibitor (D19/64); Teaching Material (D19/59); Combined (1) (D10/2)
International Classification: 1907;