US PATENT SUBCLASS 396 / FOR 752
.~.~.~ Using stepping motor (354/452)

Current as of: June, 1999
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396 /   HD   PHOTOGRAPHY

FOR 710  DF  AUTOMATIC EXPOSURE CONTROL SYSTEM OR DEVICE (354/410) {8}
FOR 746  DF  .~ Having circuit for controlling diaphragm only (354/446) {7}
FOR 751  DF  .~.~ Servo motor type (354/451) {1}
FOR 752.~.~.~ Using stepping motor (354/452)

DEFINITION

Classification: 396/FOR.752

Using stepping motor: (354/452)

Subject matter under subclass FOR 751 in which the servo circuit is used to control a stepping motor which drives the diaphragm to a specific aperture.