1421424

Information

• Patent Grant
• 1421424

• References
• Source

• Patent Number

  1,421,424

• Date Filed

  Not available

• Date Issued

  Tuesday, July 4, 1922
  102 years ago

• CPC

  • B41F1/60 - Safety devices
  • Y10T74/2194 - Automatic
  • Y10T409/30392 - with means to protect operative or machine [e.g., guard, safety device, etc.]

• US Classifications

  • 074 - Machine element or mechanism
  • 409 - Gear cutting, milling, or planing