United States Patent 2719594
US Patent References:
/0965174.html
- - 0965174

/1708398.html
- - 1708398

/2271467.html
- - 2271467

/2505124.html
- - 2505124

/2513827.html
- - 2513827


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Primary Class:
181/137
International Classes:
A61B7/02; A61B7/00