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Abdominal muscle firmness alarm

  • US 4,801,921 A
  • Filed: 08/24/1987
  • Issued: 01/31/1989
  • Est. Priority Date: 08/24/1987
  • Status: Expired due to Term
First Claim
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1. An abdominal muscle firmness trainer comprising a control unit, a signalling member selectively affixed to the abdominal region of a wearer, and means serving to transmit a signal to said signalling member, said control unit including associated timer means programming said signal transmission at a preselected interval.

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