Airplane level
Description
FIG. 1 is a top right side perspective view of an Airplane Level showing my new design;
FIG. 2 is a top left side perspective view; and
FIG. 3 is a bottom right side perspective view thereof.
Referenced Cited
U.S. Patent Documents
D53902 | October 1919 | Grant |
D54447 | February 1920 | Nelson |
D55434 | June 1920 | Peoples |
D135194 | March 1943 | Aronoff |
2012424 | August 1935 | Fincke |
Patent History
Patent number: D322581
Type: Grant
Filed: Feb 19, 1988
Date of Patent: Dec 24, 1991
Inventor: Al Heath (Bridge City, TX)
Primary Examiner: Nelson C. Holtje
Assistant Examiner: Gary D. Watson
Attorney: Kenneth D. Baugh
Application Number: 7/158,358
Type: Grant
Filed: Feb 19, 1988
Date of Patent: Dec 24, 1991
Inventor: Al Heath (Bridge City, TX)
Primary Examiner: Nelson C. Holtje
Assistant Examiner: Gary D. Watson
Attorney: Kenneth D. Baugh
Application Number: 7/158,358
Classifications
Current U.S. Class:
Spirit Level (D10/69)