[D0231AAP], Letter from Thomas Alva Edison to Eugene Howard Lewis, May 27th, 1902
https://edisondigital.rutgers.edu/document/D0231AAP
Transcription
Orange, N. J. May 27 1902 GLENMONT, LLEWELLYN PARK. My Dear Lewis In answer to Mr. Betts remark about my patent, you might call his attention to the fact that the patent is not limited to any particular form of an inductive wave Hertzian or otherwise. All waves from an introduction coil are inductive waves. They may be straight or oscillating, long or short or any form. However Mr. Betts is competent to draw his own conclusions as to the scope and value of the patent. Yours Edison.