About 2 Trademarks found that are owned by Schlumberger Industries Limited

prepayment apparatus and instruments for controlling the supply of utilities, including water, electricity, gas, or heat; apparatus and instruments, all for controlling potable water supplies; prepayment water metering apparatus and instruments, and water meters; parts for all the aforesaid goods

mass flow measuring apparatus and transducers; mass flow sensors and flow computers for use therewith; and parts for all of the aforesaid goods