|
US2034852A
|
|
Temperature indicator
|
|
US1873091A
|
|
Temperature control apparatus
|
|
US1849163A
|
|
Temperature control apparatus
|
|
US1767637A
|
|
Temperature-control apparatus
|
|
US1844415A
|
|
Valve regulating device
|
|
US1872961A
|
|
Gas and air valve
|
|
US1810331A
|
|
Oil valve
|
|
US1810314A
|
|
Snap switch
|
|
US1709104A
|
|
Remote valve-operating mechanism
|
|
US1767636A
|
|
Periodic circuit maker for electric ovens
|
|
US1788787A
|
|
Temperature-control apparatus
|
|
US1622406A
|
|
Valve
|
|
US1739882A
|
|
Temperature-control apparatus
|
|
US1606858A
|
|
Temperature-regulating apparatus
|
|
US1581260A
|
|
Safety temperature control
|
