1857559

Information

• Patent Grant
• 1857559

• References
• Source

• Patent Number

  1,857,559

• Date Filed

  Not available

• Date Issued

  Tuesday, May 10, 1932
  92 years ago

• CPC

  • G03B41/04 - with optical compensator
  • Y10T74/18072 - Reciprocating carriage motions

• US Classifications

  • 352 - Optics: motion pictures
  • 074 - Machine element or mechanism