2973237

Information

• Patent Grant
• 2973237

• References
• Source

• Patent Number

  2,973,237

• Date Filed

  Not available

• Date Issued

  Tuesday, February 28, 1961
  63 years ago

• CPC

  • G01D15/04 - acting to punch holes in the recording surface

• US Classifications

  • 346 - Recorders