1545641

Information

• Patent Grant
• 1545641

• References
• Source

• Patent Number

  1,545,641

• Date Filed

  Not available

• Date Issued

  Tuesday, July 14, 1925
  99 years ago

• CPC

  • G04B21/00 - Indicating the time by acoustic means
  • G04B37/12 - Cases for special purposes
  • G04C21/12 - by electro-acoustic means

• US Classifications

  • 368 - Horology: time measuring systems or devices
  • 968 - Horology