|
US3395614A
|
|
Inside bead trimming apparatus
|
|
GB1057868A
|
|
Rotary ball valves
|
|
GB989034A
|
|
A ball valve
|
|
US3199528A
|
|
Ball valve
|
|
US3245655A
|
|
Ball valve seat having ribbed sealing face
|
|
US3182953A
|
|
Balanced ball valve
|
|
US3182952A
|
|
Ball valves
|
|
US3087560A
|
|
Water well strainer
|
|
US3084903A
|
|
Shutoff valve with needle element therein and valve seating construction
|
|
US3063377A
|
|
Centrifugal jet pump
|
|
US2897891A
|
|
Valve for water softening
|
|
US2897968A
|
|
Valve for water-softeners
|
|
US2722360A
|
|
Apparatus for supporting and bracing ladders
|
|
US2621605A
|
|
Pump
|
|
US2575965A
|
|
Rigid joint between tubular structures
|
|
US2480490A
|
|
Electric water depth gauge
|
|
US2489715A
|
|
Packing
|
|
US2287544A
|
|
Electric welding of metals and the uniting of dissimilar metals
|
|
US2287543A
|
|
Welding method and apparatus
|
|
US2287542A
|
|
Electric induction heating
|
