3855621

Information

• Patent Grant
• 3855621

• References
• Source

• Patent Number

  3,855,621

• Date Filed

  Not available

• Date Issued

  Tuesday, December 17, 1974
  50 years ago

• CPC

  • G06K13/107 - using pneumatic means
  • G06K13/073 - with continuous movement

• US Classifications

  • 360 - Dynamic magnetic information storage or retrieval