US2869368A
|
|
Electrical water gauge
|
US2777914A
|
|
Magnetic switch
|
US2748379A
|
|
Long probe manometer
|
US2678434A
|
|
Electrically operated boiler alarm control device
|
US2547742A
|
|
Electrical alarm switch
|
US2227405A
|
|
Plural valve control
|
US2215660A
|
|
Liquid gauge apparatus
|
US2225608A
|
|
Safety liquid level gauge apparatus
|
US2183422A
|
|
Boiler signal control
|
US2036777A
|
|
Illuminated liquid level gauge
|
US2065646A
|
|
High pressure liquid level gauge
|
US1887213A
|
|
Gauge cock
|
US1932767A
|
|
High pressure liquid level gauge
|
US1925433A
|
|
Liquid-level gauge
|
US1738689A
|
|
Float and method of making same
|
US1886159A
|
|
Gauge cock
|
US1560017A
|
|
Method of making metallic floats
|
US1584007A
|
|
Valve seat
|
US1492350A
|
|
Hollow metal-coated article
|
US1599608A
|
|
Electroplated aricle and method of making same
|