Improvements in Concertinas, &c. (1861)

British Patent No. 2289 of 1861, Provisional Specification (14 September 1861) and Specification (14 March 1862) with thirty-three figures. 38 pages.
“Improvements in Concertinas, &c.”. Improvements on the preceding concertina patents, including a duet arrangement which reappears eighty years later in one of the “Wheatstone Edeophones”.
Posted 15 November 2001