1971435

Information

• Patent Grant
• 1971435

• References
• Source

• Patent Number

  1,971,435

• Date Filed

  Not available

• Date Issued

  Tuesday, August 28, 1934
  90 years ago

• CPC

  • G03B19/08 - with provision for alternative use with plates or cut-films

• US Classifications

  • 396 - Photography