[D9211AEC], Letter from Alfred Ord Tate to Louis Graham Campbell, September 27th, 1892
https://edisondigital.rutgers.edu/document/D9211AEC
Transcription
Sept 27th 92 L. G. Campbell Esq Lock Box 1053 Valparaisso Ind Dear Sir: In reply to your favor of the 24th inst Mr Edison desires me to state that he has taken out about eight hundred patents. Yours truly O. Tate. Private Secretary