Prthrust Trademarks

PRTHRUST
computer programs recorded on tapes, discs and cards for use in the analysis of piping systems
Cancelled  ·  September 13, 1990  ·  74096637  · 
PRTHRUST
Computer Programs Recorded on Tapes, Discs and Cards, for Use in the Analysis of Piping Systems
Cancelled  ·  April 27, 1979  ·  73213364  · 
PRTHRUST
COMPUTER PROGRAMMING FOR THE ANALYSIS OF PIPING SYSTEMS
Cancelled  ·  March 7, 1978  ·  73161303  ·