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Patents for H. J. Spooner | |||||
Number | Date | Patentee | Title | Type | |
RE4,197 | Dec. 13, 1870 | S. Darling | Improvment in Inkstands | draftsman | |
111,435 | Jan. 31, 1871 | S. Darling | Improvment in Inkstands | draftsman |