3820521

Information

• Patent Grant
• 3820521

• References
• Source

• Patent Number

  3,820,521

• Date Filed

  Not available

• Date Issued

  Friday, June 28, 1974
  51 years ago

• CPC

  • F02P3/0435 - with semiconductor devices
  • F02P7/028 - combined with circuit-makers or -breakers
  • F02P7/061 - pick-up devices without mechanical contacts

• US Classifications

  • 123 - Internal-combustion engines