16 Sep
2006
16 Sep
'06
5:27 p.m.
> As for patents; " A patent provides
protection for up to twenty years,
> counting from the filing date (the date given with reference numeral 22
on
> the front page). US patents with a filing date
before June 8, 1995
provide
> protection for up to seventeen years counting
from the date of grant
(the
date given
with reference numeral 45), or 20 years from the filing date,
whichever expires later. "
Correct, but trackballs date to the 1950s.
--
Will