File:Patent-AT-31185.pdf

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Brevetto di un porta mine. Estensione del brevetto n° AT-31184. Stessa invenzione di nº FR-06524E. Stessa invenzione di nº DK-09918. Stessa invenzione di nº GB-190616715. Stessa invenzione di nº CH-37618. Stessa invenzione di nº DE-183242. Stessa invenzione di nº CA-104033.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	17:37, 4 September 2021		1,296 × 1,754, 2 pages (137 KB)	Piccardi (talk \| contribs)	{{PatentInfo \|Inventor=Eduard Penkala \|Assignee=Eduard Penkala \|Country=AT \|ApplicationNum=31185 \|ApplicationDate=1906-09-25 \|PatentNum=31185 \|PatentDate=1907-12-27 \|PriorityDate=1906-09-25 \|Titolo=Füllbleistift \|Marca=Penkala \|Descrizione=Porta-mine...

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