Landis Erasing Shield

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This small plastic template, also called an erasing shield, contains a variety of curves and a straight bar. It covered correct typing to make it easier to erase errors. A mark at the top reads: THE "LANDIS" (/) PAT D NOV 27 1900.
The template was patented by Mary A. Brown of Washington, D.C., on November 27, 1900.
[Advertisement] “Typewriting Made Perfect. The “Landis” System,” Typewriter and Phonographic World, 8 #6, February, 1902, p. ix. E.S. Bass of New York listed as distributing agent.
Mary A. Brown, “Erasing-Shield for Type-writers,” U.S. Patent 662,591, November 27, 1900.
Mary A. Brown, Typewriting Made Perfect. The "Landis”, M. A. Brown: New York, 1901.
Catalogue of Keuffel & Esser Co., New York, 1909, p. 293. Keuffel & Esser’s model #3411.
Catalogue of Keuffel & Esser Co., New York, 1921, p. 222. The erasing shields shown here are not in the form of Baker’s invention.
Currently not on view
date made
ca 1905
Physical Description
plastic (overall material)
overall: .2 cm x 8.7 cm x 12.8 cm; 3/32 in x 3 7/16 in x 5 1/32 in
ID Number
catalog number
nonaccession number
Credit Line
Gift of Mrs. C. B. Schmeltzer in Memory of C. B. Schmeltzer
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Drawing Templates
Data Source
National Museum of American History


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