1978745

Information

• Patent Grant
• 1978745

• References
• Source

• Patent Number

  1,978,745

• Date Filed

  Not available

• Date Issued

  Tuesday, October 30, 1934
  90 years ago

• CPC

  • H05G1/28 - Measuring or recording actual exposure time Counting number of exposures Measuring required exposure time

• US Classifications

  • 378 - X-ray or gamma ray systems or devices