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AUTOMATIC X-RAY APPARATUS FOR LIMITING THE FIELD SIZE OF A PROJECTED X-RAY BEAM IN RESPONSE TO FILM SIZE AND TO SOURCE-TO-FILM DISTANCE

  • US 3,502,878 A
  • Filed: 09/22/1967
  • Issued: 03/24/1970
  • Est. Priority Date: 09/22/1967
  • Status: Expired due to Term
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