|
US2059130A
|
|
Operating chair
|
|
US2062592A
|
|
Headrest supporting means
|
|
US2044992A
|
|
Footrest for operating chairs
|
|
US1959682A
|
|
Extensible chair
|
|
GB368524A
|
|
Improvements in or relating to head rests for chairs or seats
|
|
US1901319A
|
|
Fountain cuspidor
|
|
US1862029A
|
|
Fountain cuspidor
|
|
US1839246A
|
|
Fountain cuspidor
|
|
US1821560A
|
|
Headrest
|
|
US1940361A
|
|
Headrest
|
|
US1817755A
|
|
Headrest
|
|
US1819842A
|
|
Lamp support
|
|
US1887328A
|
|
Dental chair
|
|
DE490023C
|
|
Electrical switch
|
|
GB288958A
|
|
Improvements in or relating to dental chairs
|
|
GB287041A
|
|
Improvements in or relating to electric circuit control means
|
|
US1877690A
|
|
Dental X-ray unit
|
|
US1754757A
|
|
Fountain cuspidor
|
|
DE519336C
|
|
Electrical limit switch for controlling two circuits
|
|
GB268842A
|
|
Improvements in or relating to electric switches
|
