1842675

Information

• Patent Grant
• 1842675

• References
• Source

• Patent Number

  1,842,675

• Date Filed

  Not available

• Date Issued

  Tuesday, January 26, 1932
  92 years ago

• CPC

  • A61F9/024 - Rotating discs with slits
  • A61F9/061 - with movable shutters

• US Classifications

  • 002 - Apparel
  • 359 - Optical: systems and elements