DUGAN SHIRLEY
Related Filers (1)
TOLLGRADE COMMUNICATIONS INC \PA\ (1)
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Ownership (4)
SC 13G/A
Tuesday, 2/8/2000
TOLLGRADE COMMUNICATIONS INC \PA\: Major Shareholders
SC 13G/A
Thursday, 2/11/1999
TOLLGRADE COMMUNICATIONS INC \PA\: Major Shareholders
SC 13G/A
Friday, 2/6/1998
TOLLGRADE COMMUNICATIONS INC \PA\: Major Shareholders
SC 13G/A
Thursday, 2/20/1997
TOLLGRADE COMMUNICATIONS INC \PA\: Major Shareholders
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