List of patents (Courtesy of Wikipedia)

British Patents:

British patent No. 12,039, Date of Application 2 June 1896; Complete Specification Left, 2 March 1897; Accepted, 2 July 1897 (later claimed by Oliver Lodge to contain his own ideas which he failed to patent)
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US Patents:

U.S. Patent 0,586,193 "Transmitting electrical signals", (using Ruhmkorff coil and Morse code key) filed December 1896, patented July, 1897
U.S. Patent 0,624,516 "Apparatus employed in wireless telegraphy".
U.S. Patent 0,627,650 "Apparatus employed in wireless telegraphy".
U.S. Patent 0,647,007 "Apparatus employed in wireless telegraphy".
U.S. Patent 0,647,008 "Apparatus employed in wireless telegraphy".
U.S. Patent 0,647,009 "Apparatus employed in wireless telegraphy".
U.S. Patent 0,650,109 "Apparatus employed in wireless telegraphy".
U.S. Patent 0,650,110 "Apparatus employed in wireless telegraphy".
U.S. Patent 0,668,315 "Receiver for electrical oscillations".
U.S. Patent 0,760,463 "Wireless signaling system".
U.S. Patent 0,792,528 "Wireless telegraphy". Filed Oct 13, 1903; Issued 13, 1905.
U.S. Patent 0,676,332 "Apparatus for wireless telegraphy" (later practical version of system)
U.S. Patent 0,757,559 "Wireless telegraphy system". Filed Nov 19, 1901; Issued Apr 19, 1904.
U.S. Patent 0,760,463 "Wireless signaling system". Filed Sep 10, 1903; Issued May 24, 1904.
U.S. Patent 0,763,772 "Apparatus for wireless telegraphy" (Four tuned system; this innovation was predated by N. Tesla, O. Lodge, and J. S. Stone)
U.S. Patent 0,786,132 "Wireless telegraphy". Filed Oct 13, 1903
U.S. Patent 0,792,528 "Wireless telegraphy". Filed Oct 13, 1903; Issued Jun 13, 1905.
U.S. Patent 0,884,986 "Wireless telegraphy". Filed Nov 28, 1902; Issued Apr 14, 1908.
U.S. Patent 0,884,987 "Wireless telegraphy".
U.S. Patent 0,884,988 "Detecting electrical oscillations". Filed Feb 2, 1903; Issued Apr 14, 1908.
U.S. Patent 0,884,989 "Wireless telegraphy".
U.S. Patent 0,935,381 "Transmitting apparatus for wireless telegraphy". Filed Apr 10, 1908; Issued Sep 28, 1909.
U.S. Patent 0,935,382 "Apparatus for wireless telegraphy".
U.S. Patent 0,935,383 "Apparatus for wireless telegraphy". Filed Apr 10, 1908; Issued Sep 28, 1909.
U.S. Patent 0,954,640 "Apparatus for wireless telegraphy". Filed Mar 31, 1909; Issued Apr 12, 1910.
U.S. Patent 0,997,308 "Transmitting apparatus for wireless telegraphy". Filed Jul 15, 1910; Issued Jul 11, 1911.
U.S. Patent 1,102,990 "Means for generating alternating electric currents". Filed Jan 27, 1914; Issued Jul 7, 1914.
U.S. Patent 1,148,521 "Transmitter for wireless telegraphy". Filed Jul 20, 1908.
U.S. Patent 1,226,099 "Transmitting apparatus for use in wireless telegraphy and telephony". Filed Dec 31, 1913; Issued May 15, 1917.
U.S. Patent 1,271,190 "Wireless telegraph transmitter".
U.S. Patent 1,377,722 "Electric accumulator". Filed Mar 9, 1918
U.S. Patent 1,148,521 "Transmitter for wireless telegraphy". Filed Jul 20, 1908; Issued Aug 3, 1915.
U.S. Patent 1,981,058 "Thermionic valve". Filed Oct 14, 1926; Issued Nov 20, 1934.