Browsing by Author Ivanovs, Semjons

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20-Oct-2016Device for air heating by solar energy = Ierīce gaisa sildīšanai ar saules enerģiju : Latvian patent : LV15142 (B)Patentai įregistruoti kitose šalyse / Patents registered in other countries (N4)
20-Jul-2016Device for air heating by solar energy = Ierīce gaisa sildīšanai ar saules enerģiju : Latvian patent application : LV15142 (A)Patentinė paraiška kitų šalių patentų biurams / Patent application to other countries patent offices (N12)