1618547

Information

• Patent Grant
• 1618547

• References
• Source

• Patent Number

  1,618,547

• Date Filed

  Not available

• Date Issued

  Tuesday, February 22, 1927
  97 years ago

• CPC

  • G10C3/30 - Couplers
  • G10C3/12 - Keyboards Keys

• US Classifications

  • 084 - Music