2938442

Information

• Patent Grant
• 2938442

• References
• Source

• Patent Number

  2,938,442

• Date Filed

  Not available

• Date Issued

  Tuesday, May 31, 1960
  64 years ago

• CPC

  • G03B9/52 - Barrel shutters

• US Classifications

  • 396 - Photography
  • 352 - Optics: motion pictures