2397031

Information

• Patent Grant
• 2397031

• References
• Source

• Patent Number

  2,397,031

• Date Filed

  Not available

• Date Issued

  Tuesday, March 19, 1946
  78 years ago

• CPC

  • G03B41/026 - combined with slit

• US Classifications

  • 396 - Photography
  • 346 - Recorders