Nikola Tesla U.S. Patent 723,188 - Method of Signaling Patent Wrapper Page 35

592 but one side of the paper. RULE 73. In every amendment the exact word or words to be stricken out or insorted in the application must bo specified and the precise point indicated where the erasure or insertion is to bo mundo. All such amendments must be on sheets of paper separate from the papers previously filed, and written on b Room No..91... All communications sold be addressed to The Commissioner of Patents, Wington, D. C." Nikola Tesla, 2-240 DEPARTMENT OF THE INTERIOR, UNITED STATES PATENT OFFICE, Care Kerr, Page & Cooper, 120 Broadway, therein. Corial No. 64.522 Inaribi y All communications respecting this application should give the serial number, hettes date of tlling, and title of invention. WASHINGTON, D. C., Mar. 17, 1902. New York City. Please find below a communication from the EXAMINER in charge of your application. Liethods of Signalling. Ser. No. 64,522, filed June 14, 1901. Fr. J. Allen The claims are The letter of March 14, 1902 is supplemented by suggestion of the claims of the other party under Rule 96. Applicant is required to make them by March 24, 1902, and in default will be held to disclaim the invention defined Commissioner of Patents. 1. In a telegraph system adapted or designed for the transmission of electrical signalling waves or inpulses of different periodicities, and the receipt thereof, audible or recorded, the method of operation here in described which consists in varying the order of transmittal of waves or impulses forming elements of the sigor another station is to be nal sent according as one signalled where (proper circuit clos ing mechanism being provided at each receiving station) the transmitted signal will be intelligible at and only at the intended receiving station, substantially as set forth. 2. A method of telegraphy, which consists in select ing and associating together in predetermined order of succession two or more electrically generated impulses of different periodicity forming elements of the signal sent and transmitting such selected impulses with reference to the conjoint action of both or all in the production of an audible or visible signal at a distant