Unipolar spiral coil electrode for monitoring the electrical activity of the brain

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Description

FIG. 1 is a side elevational view of a unipolar spiral coil electrode for monitoring the electrical activity of the brain, showing our new design, the broken line showing is for illustrative purposes only and forms no part of the claimed design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view thereof; and

FIG. 5 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
D245513 August 23, 1977 Kopel
D300175 March 7, 1989 Bar-Yam
3737579 June 1973 Bolduc
3750650 August 1973 Ruttgers
3826244 July 1974 Salcman et al.
4010758 March 8, 1977 Rockland et al.
4080961 March 28, 1978 Eaton
4090752 May 23, 1978 Long
4157710 June 12, 1979 Abitbol
4281659 August 4, 1981 Farrar et al.
4299232 November 10, 1981 Zilianti
4321931 March 30, 1982 Hon
4355642 October 26, 1982 Alferness
Foreign Patent Documents
2749048 September 1979 DEX
2830412 January 1980 DEX
Patent History
Patent number: D317502
Type: Grant
Filed: Oct 15, 1987
Date of Patent: Jun 11, 1991
Inventors: James R. Doty (Honolulu, HI), Thomas W. Furlow, Jr. (Annapolis, MD)
Primary Examiner: Stella Reid
Law Firm: Banner, Birch, McKie & Beckett
Application Number: 7/108,576