Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Publication of NL184696CpublicationCriticalpatent/NL184696C/xx
H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
H01H9/02—Bases, casings, or covers
H01H9/04—Dustproof, splashproof, drip-proof, waterproof, or flameproof casings
H01H9/042—Explosion-proof cases
H01H9/043—Explosion-proof cases with pressure-relief devices
NLAANVRAGE7402956,A1953-02-06Draad of folie van georienteerd hoge dichtheid polyetheen en werkwijze voor het vervaardigen van een gestrekt voorwerp.
NL184696C
(nl)