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Advertisements for talks & demonstrations by Elisha Gray, [bulk]: n.d.
Advertisements for talks & demonstrations by Elisha Gray, [bulk]: n.d.
1.10: Corres., specifications and legal documents regarding Gray's patents, incl. Letters Patent from Great Britain Patent Office.
1.10: Corres., specifications and legal documents regarding Gray's patents, incl. Letters Patent from Great Britain Patent Office.
1.11: Corres and legal documents between Elisha Gray and the Highland Park Building Company
1.11: Corres and legal documents between Elisha Gray and the Highland Park Building Company
1.13: Corres. both to and from Elisha Gray
1.13: Corres. both to and from Elisha Gray
1.4: Gray National Telautograph Company information catalogs
1.4: Gray National Telautograph Company information catalogs
1.6: Telautograph, including Elliott Cresson Medal award from the Franklin Institute
1.6: Telautograph, including Elliott Cresson Medal award from the Franklin Institute
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