3537003

Information

• Patent Grant
• 3537003

• References
• Source

• Patent Number

  3,537,003

• Date Filed

  Not available

• Date Issued

  Tuesday, October 27, 1970
  54 years ago

• CPC

  • H03G3/301 - the gain being continuously variable
  • A61B5/021 - Measuring pressure in heart or blood vessels
  • A61B5/024 - Detecting, measuring or recording pulse rate or heart rate
  • A61B5/04004 - Input circuits for EEG-, or EMG-signals
  • G01R23/00 - Arrangements for measuring frequencies Arrangements for analysing frequency spectra
  • H03G1/0047 - using photo-electric elements
  • H03G3/30 - in amplifiers having semiconductor devices

• US Classifications

  • 324 - Electricity: measuring and testing
  • 330 - Amplifiers
  • 368 - Horology: time measuring systems or devices
  • 600 - Surgery