On March 28, 1905, U.S. Patent No. 785,803 on the Art of Transmitting Intelligence, an early form of wireless communication.

On March 27, 1900, U.S. Patent No. 646,274 issued to Harvey S. Firestone on a Vehicle Tire:

On March 26, 1845, U.S. Patent No. 3,965 issued to William Sheout and, Horace Day on an Improvement in Adhesive Plaster — a precursor to band-aids.

On March 25, 1902, U.S. Patent No. 696,007 issued to Irving W. Colburn on a Glass Working Machine for making glass sheets.

On March 24, 1959, U.S. Patent No. 2,879,439 issued to Charles H. Townes on Product of Electromagnetic Energy (the MASER), for which he shared the 1964 Nobel Prize in Physics.

On March 23, U.S. Patent No. 4,320,756 issued to William O. Holmes on a Fresh-Air Breathing Device and Method.

Although the title seems less than accurate, it offers a (slightly) better alternative to dying in a building fire.  Mr. Holmes probably saw Towering Inferno (1974) one too many times.

On March 22, 1960, U.S. Patent No. 2,929,459 issued to Gordon Spitzmesser on a Combustible Gas Powered Pogo Stick.

On March 21, 1995, U.S. Patent No. 5,400,230 issued to Leonard D. Nicoletti, on a Pillow Light.

On March 20, 1917, U.S. Patent No. 1,219,881 issued to Gideon Sudback on A Separable Fastener — what we know as the Talon zipper.

On March 19, 1861, U.S. Patent No. RE1154 was issued to Elias Howe on the Improvements in Sewing Machines.