1920897

Information

• Patent Grant
• 1920897

• References
• Source

• Patent Number

  1,920,897

• Date Filed

  Not available

• Date Issued

  Tuesday, August 1, 1933
  91 years ago

• CPC

  • B65H23/198 - motor-controlled (Controlling electrical drive motors therefor)
  • B65H23/1806 - in reel-to-reel type web winding and unwinding mechanism
  • B65H23/1813 - acting on web-roll

• US Classifications

  • 242 - Winding, tensioning, or guiding
  • 318 - Electricity: motive power systems