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NCB - National Coal Board, later British Coal Corporation - 1574-1994
A - Pre-Vesting Colliery Companies superseded by the National Coal Board - [1672]-1972
BUT - Butterley Company Colliery Offices - 1857-1960
13 - Butterley Company Colliery Offices records on the development of collieries - 1895-1947
12 - Butterley Company Colliery Offices correspondence files and volume on stonedusting - 1910-1946
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Archive Reference / Library Class No.
NCB/A/BUT/13/12/10
Former Reference
N5/201
Title
Butterley Company correspondence file on application for patent for apparatus for distributing incombustible dust in mines
Date
Jan 1941-Mar 1941
Description
Including copy of provisional specification, Jan 1941, correspondence with patent agents William Swindell and Son of Derby, and notice of receipt of specification by the Patent Office, Mar 1941. Invented by William Stanley Fletcher
Extent
1 file
Level
File
Repository
Derbyshire Record Office
Archive Creator
Butterley Company
National Coal Board
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