Diagnostic Devices Group, Limited

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5354220 Electrical coupler for coupling an ultrasonic transducer to a catheterExpiredSep 30, 93Oct 11, 94[H01R]
5286259 Dual-diameter multifunction catheterExpiredFeb 18, 92Feb 15, 94[A61M]
5271406 Low-profile ultrasonic transducer incorporating static beam steeringExpiredMay 22, 92Dec 21, 93[A61B]
5108369 Dual-diameter multifunction catheterExpiredMar 15, 90Apr 28, 92[A61M]
4802490 Catheter for performing volumetric flow rate determination in intravascular conduitsExpiredJan 20, 87Feb 07, 89[A61B]
4674336 Volumetric flow rate determination in conduits not directly accessibleExpiredOct 25, 85Jun 23, 87[G01B, G01F]
4637401 Volumetric flow rate determination in conduits not directly accessibleExpiredNov 01, 84Jan 20, 87[A61B]

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