PRO/INTRALINK by PTC INC. (Track this)
Intl: (009) Electrical and scientific apparatus; (041) Education and entertainment US: 021; 023; 026; 036; 038; 100; 101; 107 Filing date: 07-Nov-1996 Serial number: 75194751
NUTCRACKER by PTC INC. (Track this)
Intl: (009) Electrical and scientific apparatus US: 021; 023; 026; 036; 038 Filing date: 05-Feb-1993 Serial number: 74355976
IMPLEMENTER by PTC INC. (Track this)
Intl: (009) Electrical and scientific apparatus; (016) Paper goods and printed matter US: 038; 002; 005; 022; 023; 029; 037; 038; 050 Filing date: 09-Mar-1992 Serial number: 74253739
MKS TOOLKIT by PTC INC. (Track this)
Intl: (009) Electrical and scientific apparatus US: 038 Filing date: 17-Dec-1991 Serial number: 74232236
MECHANICA by PTC INC. (Track this)
Intl: (009) Electrical and scientific apparatus US: 038 Filing date: 24-Oct-1989 Serial number: 73833643