3621750

Information

• Patent Grant
• 3621750

• References
• Source

• Patent Number

  3,621,750

• Date Filed

  Not available

• Date Issued

  Tuesday, November 23, 1971
  53 years ago

• CPC

  • G09B15/005 - of the slide type

• US Classifications

  • 084 - Music
  • 235 - Registers