US Patent Office
US agency that received Bell's telephone patent application and Gray's caveat on 14 February 1876.
OrganizationAlso known as United States Patent Office
4 Jul 1836 –
- Identifiers
- Wikidata Q1459541
US agency that received Bell's telephone patent application and Gray's caveat on 14 February 1876.
OrganizationAlso known as United States Patent Office
4 Jul 1836 –
