Title:
Self-leveling device
United States Patent 2681783
Inventors:
Smith, William J.
Publication Date:
06/22/1954
Export Citation:
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Assignee:
Smith, William J.
Primary Class:
248/181.1
Other Classes:
33/397, 33/402, 403/125
International Classes:
B63B29/12; B63B29/00
View Patent Images:
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US Patent References:
1623427Gravity table
1569325Radio direction finder
1365233Aero-inclinometer
1260181N/A
1168727N/A
Foreign References:
GB189111227A
FR387530A