Writing stylus for electrographic position location apparatus

Computer graphics processing and selective visual display system – Display peripheral interface input device – Stylus

Reexamination Certificate

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Details

C345S173000, C178S019010

Reexamination Certificate

active

07068262

ABSTRACT:
A stylus for an electrographic position location apparatus is disclosed. In one embodiment, the stylus includes a writing element that is retractable. The stylus may have a proximal end and a distal end. A conductive annular structure may be at the proximal end of the stylus.

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British Micro, “Operating Guide to Grafpad”, 1982, 28 pp.

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