|
US2998826A
|
|
Rotary pump valve
|
|
GB860906A
|
|
Improvements relating to unions between pipes
|
|
GB904566A
|
|
Improvements relating to unions between pipes
|
|
GB832264A
|
|
Improvements in or relating to vacuum pumping apparatus
|
|
US2935243A
|
|
Vacuum pumping apparatus
|
|
US2929550A
|
|
Rotary pumps and valves therefor
|
|
GB825525A
|
|
Improvements in or relating to diffusion vacuum pumps
|
|
GB843764A
|
|
Improvements in or relating to vacuum pumping apparatus
|
|
GB825526A
|
|
Improvements in or relating to rotary pumps
|
|
GB825527A
|
|
Improvements in or relating to valves
|
|
GB825524A
|
|
Improvements in or relating to rotary pumps
|
|
US2827923A
|
|
Magnetically operated valves
|
|
DE1011686B
|
|
Control for one after the other to be operated magnetically controlled valves
|
|
GB734211A
|
|
Improvements in high vacuum gauges and their method of manufacture
|
|
GB714188A
|
|
Improvements in control mechanism for a plurality of valves magnetically operated insequence
|
|
GB714187A
|
|
Improvements in solenoid operated valves
|
|
GB680577A
|
|
Improvements in laminated magnetic cores for electric transformers
|
|
GB690431A
|
|
Improvements in fluorescent electric lighting tubes
|
|
GB679849A
|
|
Improvements in electric lamp holders
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