US PATENT SUBCLASS 396 / 438
DAGUERREOTYPE
Current as of: June, 1999
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DEFINITION
Classification: 396/438
DAGUERREOTYPE:
(under the class definition) Subject matter relating to that branch of photography known as "daguerreotypy" in which sensitization and development are secured by the use of mercury vapor to produce a positive image on a silver coated copper plate.
(1) Note. Included here also is a plate vise or holder, per se, which is adapted for daguerreotype use.
SEE OR SEARCH THIS CLASS, SUBCLASS:
579, for gaseous treating photos:graphic apparatus, in general.
654, for photos:graphic plate holders, in general.
658+, for burnishing, in general.
