Parker's tracheotomy cannula
1880-1920
1880-1920
200 BCE-400 CE
199-500
199-500
199-500
199-500
500 BCE-500 CE
1866-1900
1909- 1913
1880-1920
1880-1920
1880-1920
1901-1930
1900-1930
circa 1960-1979
500 BCE-500 CE
1901-1930
199-500
199-500
199 BCE-500 CE
1851-1930; 500 BCE-500 CE
199 BCE-500 CE
199-500
1871-1900
1890-1930
1851-1900
1831-1870
1981
1851-1900
1950-1980
1851-1900
1880-1920
1973
1896-1920