Teaching aid for ultrasound wave theory

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Description

FIG. 1 is a front perspective view of a teaching aid for ultrasound wave theory showing my new design;

FIG. 2 is a front elevational view;

FIG. 3 is a rear elevational view; and,

FIG. 4 is a side elevational view, the opposite side being a mirror image thereof.

Referenced Cited
U.S. Patent Documents
D24233 April 1895 Stone
D369185 April 23, 1996 Steele
D377942 February 11, 1997 McClay
822783 June 1906 Smith
1766355 June 1930 Redman
2270120 January 1942 Greene
2697234 December 1954 Sturdevant
3404566 October 1968 Cordova
3733708 May 1973 Goodman
4058010 November 15, 1977 Woodhouse
4243223 January 6, 1981 Ver Hoef et al.
5343743 September 6, 1994 Chapman
Foreign Patent Documents
1624502 January 1991 SUX
Patent History
Patent number: D403018
Type: Grant
Filed: Oct 1, 1996
Date of Patent: Dec 22, 1998
Assignee: Joseph S. Powell (Port St. John, FL)
Inventor: Joseph Scott Powell (Port St. John, FL)
Primary Examiner: Martie K. Holtje
Application Number: 0/60,583
Classifications
Current U.S. Class: Teaching Material (D19/59); Movable Indicator Or Changeable Exhibitor (D19/64)
International Classification: 1907;