Drafting device
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United States of America Patent
Stats
-
Jul 21, 1992
Grant Date -
N/A
app pub date -
Jun 5, 1991
filing date -
Jun 5, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A drafting device includes a body and a roller assembly rotatably mounted on the body for allowing movement of the drafting device across a support surface. The drafting device also includes a spring disposed between the body and roller assembly for producing friction on the roller assembly to resist unintended rolling of the roller assembly.
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