Stereo headrest for dental chairs

Description

FIG. 1 is a perspective view of a stereo headrest for dental chairs showing our new design, with its flexible strap portion folded under;

FIG. 2 is a front elevational view thereof, with its flexible strap portion extended;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof; and

FIG. 6 is a back elevational view thereof.

Referenced Cited
U.S. Patent Documents
D174974 June 1955 Wilson
D188416 July 1960 Ramm
D198211 May 1964 Apel
D211523 June 1968 Duern
D218234 August 1970 Belk
D233200 October 1974 Madl
2908766 October 1959 Taylor
3098128 July 1963 Audin
3230320 January 1966 Kerr
3366417 January 1968 Belk
3384719 May 1968 Lanzara
3452836 July 1969 Carsello et al.
3512605 May 1970 McCorkle
3976162 August 24, 1976 Cummings
4027112 May 31, 1977 Heppner et al.
4042791 August 16, 1977 Wiseman
Patent History
Patent number: D277630
Type: Grant
Filed: Sep 29, 1982
Date of Patent: Feb 19, 1985
Inventors: David V. Olson (Minneapolis, MN), Steven T. Matthews (Bloomington, MN)
Primary Examiner: Bruce W. Dunkins
Law Firm: Burd, Bartz & Gutenkauf
Application Number: 6/428,126
Classifications
Current U.S. Class: D/6501