3866864

Information

• Patent Grant
• 3866864

• References
• Source

• Patent Number

  3,866,864

• Date Filed

  Not available

• Date Issued

  Tuesday, February 18, 1975
  50 years ago

• CPC

  • G03B27/462 - in enlargers
  • G03B27/22 - by stretching over a curved surface

• US Classifications

  • 248 - Supports