Title:
Indicating device for ladders and the like
United States Patent 2845719
US Patent References:
/0117677.html
- - 0117677

/0168933.html
- - 0168933

/0262859.html
- - 0262859

/0450457.html
- - 0450457

/0488428.html
- - 0488428


Inventors:
Thomiszer, Hubert J.
Publication Date:
08/05/1958
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Assignee:
Thomiszer, Hubert J.
Primary Class:
182/18
Other Classes:
33/333, 33/388, 116/315, 33/370, 116/280, 182/129, 116/307, 182/107
International Classes:
E06C7/00; G01C9/24; G01C9/26; G01C9/18
US Patent References:
0527815
0802879
1063831
1323148
1526265Electrical connection
1920892Spirit level
2058743Beam level indicator for automobile head lamps
2068103Spectacle level
2251640Level attachment for pencils
2397550Inclinometer
2494278Hat attached posture indicator
2541880Rotatable level
Foreign References:
CA464585A