Specification of Julius Jeffreys
Subtitle: respirators
Publisher: Great Seal Patent Office
Published: 1857
Place of publication: London
Language: eng
Subjects: Respirators (Medical equipment)
Description: Patent for improvements to his previous design for a respirator.
Notes: At head of title: A.D. 1844. No. 10.287.

"Julius Jeffreys, of Clapham, in the county of Surrey, gentleman".