Identifies all U.S. patents related to photography during the wet plate era. To be included in this list the patent had to have direct application to photography or its application had to be recognized & indicated by the applicant. There is no easy way to identify 19th-cent. patents by one simple subject heading, instead photographic patents appear in the official records under such headings as album, albumen, ambrotype, camera, carte de visite, collodion, daguerreotype, ferrotype, magic lantern, multiplying camera, picture card holder, plate holder, portable camera, solar camera & stereoscope, & photograph or photographic. Contents: List by Title, Patentee, Residence & Date for Invention, Reissued Invention, & Design Patents. Illus.