1977598

Information

• Patent Grant
• 1977598

• References
• Source

• Patent Number

  1,977,598

• Date Filed

  Not available

• Date Issued

  Tuesday, October 16, 1934
  90 years ago

• CPC

  • G10B1/04 - electrically operated
  • Y10S84/21 - Mechanical resonator

• US Classifications

  • 084 - Music