US PATENT SUBCLASS 396 / FOR 789
.~.~ Flash unit includes spare lamps (354/143)

Current as of: June, 1999
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396 /   HD   PHOTOGRAPHY

FOR 771  DF  OBJECT ILLUMINATION COMBINED WITH CAMERA STRUCTURE (354/126) {5}
FOR 776  DF  .~ Having camera synchronization (354/129) {15}
FOR 789.~.~ Flash unit includes spare lamps (354/143) {1}
FOR 790  DF  .~.~.~> Having unison film advance and lamp switching (354/144)

DEFINITION

Classification: 396/FOR.789

Flash unit includes spare lamps: (354/143)

Subject matter under subclass FOR 776 including means for sequentially substituting operative lamps for expended lamps.