Water supply system with filtration and retrofit assembly
US2008203025A1
Low pressure production of drinking water
HUT53971A
Method for the protection of data-processing systems
HUT54000A
Method for data protection during data transfer
FI892616A0
Foerfarande foer saekerhetsuppraetthaollande i ett databehandlingssystem.
DK264289D0
Procedure for keeping safety in computer
FI892617A0
Foerfarande foer uppraetthaollande av integritet av objektkoddatameddelanden av binaertyp.
DK264389D0
Procedure for keeping data integrity during transmission of information
US4866666A
Method for maintaining data integrity during information transmission by generating indicia representing total number of binary 1's and 0's of the data
US4845715A
Method for maintaining data processing system securing