original Patent - Karl Koeppe | Hecht & Koeppe , Leipzig , 1879 , Übersteigendes Wasserfilter | Wasser - Filter !!!

Original Patent - Karl Koeppe | Hecht & Koeppe , Leipzig , 1879 , Übersteigendes Wasserfilter | Wasser - Filter !!! - Historical Documents
Original Patent - Karl Koeppe | Hecht & Koeppe , Leipzig , 1879 , Übersteigendes Wasserfilter | Wasser - Filter !!! - Historical Documents
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