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Ref No	33-B/5/2/5
Title	File relating to Improvements in Butterfly Valves
Description	Including; patent specifcations for patent no.s 435,059, 895,163 and 915,108; correspondence regarding the specifications; drawings; Guest and Chrimes patent application for butterfly valves; notebook; and leaflets on butterfly valves.
Date	c. 1965
Format	Typescript
Extent	1 File
Access Status	Open

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