3809889

Information

• Patent Grant
• 3809889

• References
• Source

• Patent Number

  3,809,889

• Date Filed

  Not available

• Date Issued

  Tuesday, May 7, 1974
  50 years ago

• CPC

  • H01J31/50 - Image-conversion or image-amplification tubes
  • H01J29/003 - Arrangements for eliminating unwanted electromagnetic effects
  • H01J2229/003 - Preventing or cancelling fields entering the enclosure
  • H01J2231/50036 - X-rays
  • H01J2231/50063 - Optical
  • H01J2231/5056 - magnetic

• US Classifications

  • 250 - Radiant energy