File:LeblancFDM.jpg
The original patent contains no such notice, so its contents are in the public domain.
Note: This only applies to images published before March 1, 1989. Patents published after that date are most likely copyrighted, unless in the public domain for another reason, such as {{PD-ineligible}}.
Other versions
https://ppubs.uspto.gov/pubwebapp/
Blob:https://ppubs.uspto.gov/bcf56a07-a06d-441f-a410-2165963527b4Original upload log
The original description page was here. All following user names refer to en.wikipedia.
- 2009-06-05 17:37 Spinningspark 1000×1154× (250606 bytes) {{Information |Description=The multiple telegraph (FDM) cicuit of Hutin and Leblanc from 1891 |Source=US patent US0838545 |Date=9 May 1894 (filed) |Author=Maurice Hutin, Maurice Leblanc |other_versions= }} == Licensing == {{PD-US-patent}} {{KeepLocal}}
