Electret holder for a radon gas detector

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Description

FIG. 1 is a side perspective view of our new design for an electret holder for a radon gas detector;

FIG. 2 is a side elevational view of our new design, the opposite side being identical; and,

FIG. 3 is a top plan view of our new design.

Referenced Cited
U.S. Patent Documents
D53911 October 1919 Humphrey
D269858 July 26, 1983 Alter
D318022 July 9, 1991 Ramsey, Jr.
D327121 June 16, 1992 Ramsey, Jr. et al.
3898464 August 1975 Stephan
4581536 April 8, 1986 Groppetti et al.
4980550 December 25, 1990 Port et al.
5132535 July 21, 1992 Steck
5134297 July 28, 1992 Harley et al.
5324948 June 28, 1994 Dudar et al.
Other references
  • Lug nuts on p. 80 of J. C. Whitney & Co. Cat. 575J .COPYRGT.1994. Nuts on p. 2 of Gripco Bulletin 161-4, Feb. 17, 1964. Nuts on p. 7 of Palnut Cat. 590-B.
Patent History
Patent number: D374659
Type: Grant
Filed: Dec 2, 1994
Date of Patent: Oct 15, 1996
Assignee: Radon Testing Corporation of America (Irvington, NY)
Inventor: Robert W. Ramsey, Jr. (Woodsboro, MD)
Primary Examiner: Joel Sincavage
Law Firm: Darby & Darby, P.C.
Application Number: 0/31,685
Classifications
Current U.S. Class: Miscellaneous (D13/199)