1749779

Information

• Patent Grant
• 1749779

• References
• Source

• Patent Number

  1,749,779

• Date Filed

  Not available

• Date Issued

  Tuesday, March 11, 1930
  94 years ago

• CPC

  • G03B21/32 - Details specially adapted for motion-picture projection
  • G03B21/48 - for altering frame speed for regulating constancy of film speed

• US Classifications

  • 352 - Optics: motion pictures