EX-4.3
from S-8
8 pages
Helix Technology Corporation 1981 Employee Stock Option Plan Adopted November 11, 1981 Amended April 14, 1982 Amended February 6, 1985 Amended December 9, 1987 Amended February 5, 1988 Amended April 13, 1988 Amended February 8, 1989 Amended February 13, 1992
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