Spark plug service unit

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Description

FIG. 1 is a top right front perspective view of a spark plug service unit showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof; and

FIG. 6 is a right side elevational view thereof.

Referenced Cited
U.S. Patent Documents
D120929 June 1940 Hoke
D122301 September 1940 Reeves
D154380 July 1949 Gettleman
D168324 December 1952 Vogel
2295453 September 1942 Denison
2892149 June 1959 Persak
Patent History
Patent number: D250755
Type: Grant
Filed: Oct 12, 1976
Date of Patent: Jan 9, 1979
Assignee: Champion Spark Plug Company (Toledo, OH)
Inventors: Lawrence R. Lentz (Sylvania Township, Lucas County, OH), Ronald E. Blackman (Toledo, OH), Donald M. Potter (Toledo, OH)
Primary Examiner: Nelson C. Holtje
Attorney: Allen Owen
Application Number: 5/731,794
Classifications
Current U.S. Class: Battery, Vaccum Tube, Transistor Or Spark Plug Tester (11) (D10/77)
International Classification: D1004;