Patents for Inventions : Abridgments of specifications. : class 9, ammunition. torpedoes, explosives, and pyrotechnics. : Period-A.D. 1889-1892 Patents for Inventions : Abridgments of specifications. : class 9, ammunition. torpedoes, explosives, and pyrotechnics. : Period-A.D. 1884-1888 Patents for Inventions : Abridgments of specifications. : class 9, ammunition. torpedoes, explosives, and pyrotechnics. : Period-A.D. 1867-1876 Patents for Inventions : Abridgments of specifications. : class 9, ammunition. torpedoes, explosives, and pyrotechnics. : Period-A.D. 1855-1866 Nederlands roem in het verleden en heden / onder leiding van P.H. Ritter Jr. ; met medewerking van Jan H. Eekhout ... [et al.]