3553959

Information

• Patent Grant
• 3553959

• References
• Source

• Patent Number

  3,553,959

• Date Filed

  Not available

• Date Issued

  Tuesday, January 12, 1971
  54 years ago

• CPC

  • G04F1/08 - by a body falling a prefixed distance in air or in a viscous material

• US Classifications

  • 368 - Horology: time measuring systems or devices
  • 968 - Horology
  • D10 - Measuring, testing, or signalling instruments