Registration number (WIID)Project No.TitleStatus
45343HD 529 S1:1989Compact disc digital audio systemAtcelts
42659HD 527 S1:1989Measuring method for chrominance signal-to-random noise ratio for video tape recordersAtcelts
43139HD 514 S1:1989Pre-recorded optical reflective videodisk system - 'Laser vision' 50Hz/625 lines - PALAtcelts
43087HD 507 S1:1988Time and control code for video tape recordersAtcelts
43678HD 483.5 S2:1994Sound system equipment - Part 5: LoudspeakersAtcelts
56958HD 483.5 S1:1990Sound system equipment - Part 5: LoudspeakersAtcelts
54197HD 483.3 S2:1992Sound system equipment - Part 3: AmplifiersAtcelts
50563HD 483.3 S1:1990/prAXSound system equipment - Part 3: AmplifiersIzstrādē
50780HD 483.3 S1:1990Sound system equipment - Part 3: AmplifiersAtcelts
51883HD 483.2 S2:1993Sound system equipment - Part 2: Explanation of general terms and calculation methodsAtcelts
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