JUST A FEW LINKS
Research on USA patents
http://www.google.com/patents
Research on the History of visual documents
http://sympa.ehess.fr/sympa/info/photohist
History of Photography
http://tech.groups.yahoo.com/group/PhotoHistory/
Conservation of Photographic Material
http://tech.groups.yahoo.com/group/photoconservation/
United States Patent and Trademark Office
http://www.uspto.gov/patft/
Image Permanence Institute
http://www.imagepermanenceinstitute.org/
Conservation and identification of photographic prints (by Luis Nadeau)
http://www.photoconservation.com/
French museum of photography
http://photographie.essonne.fr/
"Nièpce's house" as it were
http://www.nicephore-niepce.com/home-fr.html
French patents office's website
http://www.inpi.fr
