3626483 is referenced by 16 patents and cites 6 patents.

A writing stylus for use as a graphical-input terminal for digital computers. The stylus will produce a fast rise time shock energy sound wave generated by a spark detectable by coordinately placed microphones, at the instant the spark is produced can be determined and recorded in digital form.

Title
Spark pen
Application Number
04/842,148
Publication Number
3626483
Application Date
July 16, 1969
Publication Date
December 7, 1971
Inventor
Phillips Stanely
Banks William
Fine Samuel
Whetstone Albert
Assignee
Science Accessories Corporation
IPC
G01v 01/02
G06F 03/33
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