- TitleFrench patent for improvements to prismatic binoculars. Granted to Thomas Rudolphus Dallmeyer. No 314397
- Reference198028/2/7
- Date1901 - 1903
- CreatorJH Dallmeyer Ltd
- Scope and ContentWith statement of patent use, renewal certificates, diagram and associated material
- LanguageEnglish
- SubjectFrance