Ladder
United States Patent 2641401
US Patent References:
/0234389.html
- - 0234389

/0435266.html
- - 0435266

/0666948.html
- - 0666948

/0973103.html
- - 0973103

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- - 0983172


Inventors:
Herschel, James
Publication Date:
06/09/1953
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Assignee:
Herschel, James
Primary Class:
182/200
Other Classes:
182/207, 182/189, 182/206
International Classes:
E06C1/38; E06C1/00
US Patent References:
1101949
1780386Leveling attachment for ladders
2049151Fruit ladder
2052439Fireman's extension ladder for roofs
2288822Apparatus for varying the position of microphones
Foreign References:
GB518427A