Rubber mouth gag
1950-1990
Electro-Convulsive Therapy mouth gags
1950-1990
Screw-shaped mouth gag, Europe, 1880-1920
1880-1920
Fergusson-type anaesthetic mouth gag with Ackland tooth plates
1904-1935
Mouth gag
1900-1999
Modified Sydenham mouth gag
1939-1945
Mouth gag invented by Croft
1870-1900
Gag mouth Doyen's
1870-1935
Mouth gag, Mason's with Ackland's parallel blades
1900-1935
Davis Boyle's mouth gag with 2 tongue depressors (anaesthetic tubes attached) by Down Bros. Ltd.
1939-1945
Mouth Gag
Mouth speculum (gag)
Mouth gag
1860-1900
Fergusson's mouth gag
1920-1950
Rubber mouth gag
1950-1990
Rubber mouth gag
1950-1990
Rubber mouth gag
1950-1990
Electro-Convulsive Therapy mouthgag
1950-1980