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n5google.
isaphttp://webisa.webdatacommons.org/prov/
isahttp://webisa.webdatacommons.org/
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provhttp://www.w3.org/ns/prov#
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Subject Item
isa:369971330
rdf:type
prov:Entity
prov:value
Except for the mechanical aspects of the ball itself (and in some instances the bearings on which the ball is supported), the electronic trackball of the present invention is entirely optical; when the ball is included, the trackball of the present invention may reasonably be thought of as an optomechanical pointing device although it has no mechanical moving parts other than the ball.
prov:wasQuotedFrom
n5:ca
Subject Item
isap:179215391
prov:wasDerivedFrom
isa:369971330