1990528

Information

• Patent Grant
• 1990528

• References
• Source

• Patent Number

  1,990,528

• Date Filed

  Not available

• Date Issued

  Tuesday, February 12, 1935
  89 years ago

• CPC

  • H01H47/18 - for introducing delay in the operation of the relay
  • A45D6/20 - Temperature-regulating devices for hair curlers
  • Y10T307/406 - Control of current or power
  • Y10T307/951 - With time delay or retardation means

• US Classifications

  • 307 - Electrical transmission or interconnection systems
  • 219 - Electric heating