2986140

Information

• Patent Grant
• 2986140

• References
• Source

• Patent Number

  2,986,140

• Date Filed

  Not available

• Date Issued

  Tuesday, May 30, 1961
  63 years ago

• CPC

  • A61C1/081 - Pain-alleviating features
  • A61C19/00 - Dental auxiliary appliances
  • A61M21/00 - Other devices or methods to cause a change in the state of consciousness Devices for producing or ending sleep by mechanical, optical, or acoustical means
  • A61M2021/0027 - by the hearing sense

• US Classifications

  • 600 - Surgery
  • 331 - Oscillators