3488557

Information

• Patent Grant
• 3488557

• References
• Source

• Patent Number

  3,488,557

• Date Filed

  Not available

• Date Issued

  Tuesday, January 6, 1970
  55 years ago

• CPC

  • G01J1/44 - Electric circuits
  • G01J1/42 - using electric radiation detectors
  • G03B7/04 - Control effected by hand adjustment of a member that senses indication of a pointer of a built- in light-sensitive device
  • G03B7/085 - for control of aperture

• US Classifications

  • 315 - Electric lamp and discharge devices: systems
  • 250 - Radiant energy
  • 356 - Optics: measuring and testing