- TitleUS patent for prismatic binocular telescope. Granted to Frederick Humphrey Hill No 699168
- Reference198028/2/15
- Date1901 - 1902
- CreatorJH Dallmeyer Ltd
- Scope and ContentWith Hill's assignment of the US patent rights to TR Dallmeyer
- LanguageEnglish
- Persons keywordFrederick Humphrey electrical engineer Hill
- SubjectUSA