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Facts about "Patent-US-1905920.pdf"
Application dateFebruary 24, 1931 +
Application number515898 +
Assigned toW. A. Sheaffer Pen Company +
Invented byWilliam H. Lindemon +
Patent dateApril 25, 1933 +
Patent descriptionMatita per combo +
Patent number1905920 +
Patent titleMechanical pencil +
Patented byW. A. Sheaffer Pen Company +
Patented inUS +
Priority dateFebruary 24, 1931 +