Cornelius Knudsen Drawing Pen

This 6" aluminum, German silver, and steel drawing pen is marked: CORN.KNUDSEN. Trademarks of two superimposed dividers are on either side of the mark. In 1838 Cornelius Knudsen founded a firm in Copenhagen, Denmark, that made optical, navigational, and surveying instruments, planimeters, and equipment for telegraphy into the 1930s. This object was received and is stored with a set of drawing instruments, 1985.0909.01. It was owned by Harald Trap Friis (1893–1976), a Danish emigrant who became a prominent radio engineer for Bell Labs.
Currently not on view
Object Name
date made
ca 1920-1958
Knudsen, Cornelius
Physical Description
aluminum (overall material)
german silver (overall material)
steel (overall material)
overall: 1 cm x 15.1 cm x .8 cm; 13/32 in x 5 15/16 in x 5/16 in
place made
Danmark: København, Copenhagen
ID Number
accession number
catalog number
Drafting, Engineering
Drawing Instruments
See more items in
Medicine and Science: Mathematics
Science & Mathematics
Pens and Pencils
Data Source
National Museum of American History, Kenneth E. Behring Center
Credit Line
Transfer from Library of Congress, Exchange and Gift Division
Additional Media

Visitor Comments

Add a comment about this object

**Please read before submitting the form**

Have a comment or question about this object to share with the community? Please use the form below. Selected comments will appear on this page and may receive a museum response (but we can't promise). Please note that we generally cannot answer questions about the history, rarity, or value of your personal artifacts.

Have a question about anything else, or would you prefer a personal response? Please visit our FAQ or contact page.

Personal information will not be shared or result in unsolicited e-mail. See our privacy policy.

Enter the characters shown in the image.