American Photographic Patents
Subtitle: The Daguerreotype and Wet Plate Era 1840-1880
Publisher: Carl Mautz Pub
Published: October 2002
Language: eng
Format: Paperback
Number of pages: 128
ISBN-13: 9781887694216
Subjects: History; Photography; Photo Essays
First sentence: In order to encourage improvements in the applied arts, the United States government in 1970 gave inventors (citizens and non-citizens) temporary, exclusive rights to profit from their inventions.