A few early patents don't have an official number. You can list those by typing s.n. (sin numero) in the search field. A few other patents have a yet unknowed number (100 French photographic patents listed in a XIXth century American archivists' publication, without numbers) those can be checked at the I.N.P.I. with the year and name. If you know anything about those, please fill out the modification forms (clic on the black links of the lists). Your name, publications and copyrights will be quoted as an introduction.
© Constantin IMBS February 2007 |
