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www.google.cahttp://www.google.ca/patents/US2994618?utm_source=gb-gplus-sharePatent US2994618 - LANDGRAF Patent US2994618 - LANDGRAF

Patent US2994618 - LANDGRAF

LANDGRAF

G. F. LANDGRAF et al

Abstract

Overview
Abstract
Drawings
Description
Claims

Patent number: 2994618
Filing date: 22 Jan 1957
Issue date: 1 Aug 1961

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