Patents for inventions
Subtitle: abridgments of specifications. : period - A.D. 1921-25 [155,801-244,800].
Publisher: H.M.S.O.
Published: 1929
Place of publication: London
Language: eng
Number of pages: 47
Subjects: Velocipedes -- Great Britain -- Patents.; Bicycles -- Great Britain -- Patents.
Genres: Patents.
Notes: Including hand and foot driving-mechanism for apparatus other than vehicles.