Title:
Ladders
Document Type and Number:
United States Patent 3354987

Inventors:
Werner, Richard L.
Kocina, Lawrence A.
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Sponsored by:
Flash of Genius
Publication Date:
11/28/1967
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Referenced by:
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Assignee:
WERNER CO INC R D
Primary Class:
182/228.400
Other Classes:
29/512, 182/228.600, 29/509, 29/524.100, 29/523
International Classes:
E06C7/08; E06C7/00
US Patent References:
0610909
0807076
3039186Method of forming a joint between the rail and rung of a ladder
3119435Apparatus for connecting presemiflanged rungs to preapertured spaced ladder rails
3208554Rung and side rail connection for ladders
Foreign References:
GB845803A




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