Государственная Рижская Кондитерская Фабрика "Узвара"
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Priority to SU904846375ApriorityCriticalpatent/RU1780581C/ru
Priority to LV920198Aprioritypatent/LV5339A3/lv
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Патент US Nfe 4723614, кл G 01 G 13/02, 1988 Патент US № 3557888, кл. G 01 G 13/00. 1971. Авторское свидетельство СССР Мг 458714, кл. G 01 G 13/04. 1973.*