Revision history of "File:Patent-GB-638420.pdf"

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Fatti riguardanti Patent-GB-638420.pdf
Application dateaprile 8, 1947 +
Application number9323/47 +
Assigned toEtablissement Stylomine +
Patent dategiugno 7, 1950 +
Patent descriptionMatita meccanica +
Patent number638420 +
Patent titleImprovements in or relating to multiple lead pencils +
Patented byStylomine +
Patented inGB +
Priority dateaprile 11, 1946 +
Same invention ofFile:Patent-FR-926468.pdf +, File:Patent-US-2517522.pdf +, File:Patent-CH-259468.pdf + e File:Patent-BE-472348.pdf +