3815982

Information

• Patent Grant
• 3815982

• References
• Source

• Patent Number

  3,815,982

• Date Filed

  Not available

• Date Issued

  Tuesday, June 11, 1974
  50 years ago

• CPC

  • G03B19/26 - with fade-in and fade-out effects
  • G03B7/0807 - Control circuits
  • G03B7/085 - for control of aperture
  • G03B9/08 - Shutters

• US Classifications

  • 352 - Optics: motion pictures
  • 396 - Photography