1957152

Information

• Patent Grant
• 1957152

• References
• Source

• Patent Number

  1,957,152

• Date Filed

  Not available

• Date Issued

  Tuesday, May 1, 1934
  91 years ago

• CPC

  • G10H3/02 - using mechanical interrupters
  • Y10T307/872 - Repetitive make and break

• US Classifications

  • 084 - Music
  • 307 - Electrical transmission or interconnection systems
  • 310 - Electrical generator or motor structure
  • 381 - Electrical audio signal processing systems and devices
  • 984 - Musical instruments