Multi-vial level attachment for hand-held drills

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Description

FIG. 1 is a front, top and left side perspective view of the multi-vial level attachment for hand-held drills showing my new design, the rear view being plain and unornamented.

FIG. 2 is a front, top and right side perspective view thereof;

FIG. 3 is a left side elevational view thereof.

Referenced Cited
U.S. Patent Documents
D162841 April 1951 King
D255504 June 24, 1980 Vanderwerf
1333559 March 1920 Moulton
2820302 January 1958 Mitchell
4125944 November 21, 1978 Esposito et al.
4141151 February 27, 1979 Jansky
4393599 July 19, 1983 Sterrenberg
Foreign Patent Documents
1934717 February 1970 DEX
Other references
  • DeJon Co. Advertising Mailer for the "Drill-Level". Do-It-Yourself-Retailing Aug. 1986 p. 32 "Drill-Level".
Patent History
Patent number: D310772
Type: Grant
Filed: Apr 24, 1986
Date of Patent: Sep 25, 1990
Inventor: David E. Johnson (Lancaster, OH)
Primary Examiner: Bruce W. Dunkins
Assistant Examiner: Clare E. Heflin
Attorney: James C. Simmons
Application Number: 6/857,619
Classifications
Current U.S. Class: D 8/70; Spirit Level (D10/69)