US PATENT SUBCLASS 396 / FOR 819
.~.~ Having spring tension indicator (354/172)

Current as of: June, 1999
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396 /   HD   PHOTOGRAPHY

FOR 817  DF  MOTOR FILM DRIVE (E.G., SPRING, ETC.) (354/170) {1}
FOR 818  DF  .~ Automatic film advance (354/171) {2}
FOR 819.~.~ Having spring tension indicator (354/172)

DEFINITION

Classification: 396/FOR.819

Having spring tension indicator: (354/172)

Subject matter under subclass FOR 818 including means to indicate to an operator of a camera information pertaining to the operation of a spring motor.