Combined global positioning system antenna and preamplifier

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Description

FIG. 1 is a top, front and left side perspective view of a combined global positioning system antenna and preamplifier for a portable grid locator showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The electric cord in FIGS. 1-4, 6, and 7 is fragmentarily shown for the convenience of illustration.

Referenced Cited
U.S. Patent Documents
D304944 December 5, 1989 Behringer
D327690 July 7, 1992 Ogawa et al.
D338206 August 10, 1993 Sawaguchi et al.
2565900 August 1951 Wiley
4878062 October 31, 1989 Craven et al.
Patent History
Patent number: D346170
Type: Grant
Filed: Apr 17, 1992
Date of Patent: Apr 19, 1994
Assignee: Trimble Navigation Limited (Sunnyvale, CA)
Inventor: John G. Tang (San Carlos, CA)
Primary Examiner: Bernard Ansher
Assistant Examiner: Richelle Shelton
Attorney: Thomas E. Schatzel
Application Number: 7/870,704
Classifications
Current U.S. Class: Antenna Or Component Thereof (27) (D14/230)