Assignee

LACHMAN RONALD D

US·1 granted patent·86 citations·filing 1988–1988

Technology mixB60K1 G06F1 Y10T1

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0193US5021771AComputer input device with two cursor positioning spheresLACHMAN RONALD D·Filed 1988·Granted Jun 4, 1991·86 cites·5 claims

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