United States Patent 3125929
US Patent References:
/0049500.html
- - 0049500

/0298430.html
- - 0298430

/0700835.html
- - 0700835

/0794652.html
- - 0794652

Trestle
- - 2666673


Publication Date:
03/24/1964
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Primary Class:
89/37.040
Other Classes:
297/135
International Classes:
F41A23/00