3879970

Information

• Patent Grant
• 3879970

• References
• Source

• Patent Number

  3,879,970

• Date Filed

  Not available

• Date Issued

  Tuesday, April 29, 1975
  49 years ago

• CPC

  • E05B51/02 - by pneumatic or hydraulic means
  • G07C9/00658 - operated by passive electrical keys
  • Y10T70/7051 - Using a powered device [e.g., motor]
  • Y10T70/7458 - Interdependent
  • Y10T137/8192 - Unobvious - "combination lock" type
  • Y10T137/87917 - Flow path with serial valves and/or closures

• US Classifications

  • 070 - Locks
  • 137 - Fluid handling