H. J. P. Sprengel
From Graces Guide
H. J. P. Sprengel ( -1906)
1871 Hermann Sprengel, of Gloucester-street, Belgrave-road, in the county of Middlesex, has given notice in respect of the invention of "improvements in the preparation of safety explosive compounds."[1]
1872 Hermann Sprengel, ... has given notice in respect of the invention of "improvements in the preparation of explosive compounds."[2]
1873 Hermann Sprengel, .... has given notice in respect of the invention of "improvements in the production of sulphuric acid."[3]
1906 Obituary [4]
See Also
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Sources of Information
- ↑ London Gazette 25 April 1871
- ↑ London Gazette 13 Feb 1872
- ↑ London Gazette 18 November 1873
- ↑ Engineering 1906 Jan-Jun: Index: General Index