On March 18, 1952, U.S. Patent No. 2,590,026 issued to Marc Brother Zeppo Marx on a  Vapor Delivery Pad for Distributing Moist Heat.

On March 17, 1998, U.S. Patent No. 5,727,565 issued to Deloris Wood on a Kissing Shield,

On March 16, 1948, U.S. Patent No. 2,437,690 issued to Peter Goldmark on Color Television.

On March 15, 1982, U.S. Patent No. 470,918 issued to Jesse W. Reno, on an Endless Conveyor or Elevator, which was used as an amusement at Coney Island.

On March 14, 1794, U.S. Patent No. X27 issued to Eli Whitney on the Cotton Gin.

On March 13,. 1877, U.S. Patent No. 188,292 issued to Chester Greenwood on Ear-Mufflers:

On March 12, 1991, U.S. Patent No. 4,998,724 issued to model Christie Brinkley on an Educational Toy.

On March 11, 1851, U.S. Patent No. 7,972 issued to James W. Fowle on a Rock-Drilling Machine.

On March 10, 1896, U.S. Patent No. 556,258 issued to James.C. Boyle on a Saluting Device.  A tip of the hat to James!

On March 9, 1858, U.S. Patent No. 19578 issued to Albert Potts on a Letter Box.