1521600

Information

• Patent Grant
• 1521600

• References
• Source

• Patent Number

  1,521,600

• Date Filed

  Not available

• Date Issued

  Tuesday, January 6, 1925
  100 years ago

• CPC

  • G04C21/205 - by the hand(s) or handlike members closing the contact

• US Classifications

  • 368 - Horology: time measuring systems or devices
  • 200 - Electricity: circuit makers and breakers
  • 968 - Horology