25 February 1895
Patent
2
19 August 1896
Patent
10
9 May 1901
Patent
23 October 1903
Patent
2
17 November 1903
Patent
2
12 August 1904
Patent
6
18 September 1889
Letter
3
between 7 January 1907 and 8 January 1918
Dossier
4 February 1920
Patent
3
6 May 1872
Circular
5 October 1872
Circular
23 November 1872
Circular
8 January 1873
Circular
25 January 1873
Circular
14 March 1873
Circular
16 April 1873
Circular
5 May 1873
Circular
21 May 1873
Circular
7 March 1874
Letter
1 March 1875
Report
4 April 1875
Letter