Patents for inventions
Subtitle: abridgments of specifications 540,001-560,000.
Publisher: H.M.S.O.
Published: 1955
Place of publication: London
Language: eng
Number of pages: 82
Subjects: Bicycles -- Great Britain -- Patents.; Automobiles -- Great Britain -- Patents.
Genres: Patents.
Notes: Comprising classes 79(i-v); 136(i-iii).