Specification of Frederick Charles Rein
Subtitle: apparatus for excluding sound from the ear
Publisher: Great Seal Patent Office
Published: 1865
Place of publication: London
Language: eng
Subjects: Rubber; Transportation Noise; Ear Protective Devices; Noise control; Prevention & control
Notes: At head of title: A.D. 1864, 1st December. No. 3000.

"Frederick Charles Rein, of the Strand, in the County of Middlesex, acoustical instrument maker".