Title	Patent Filing Date
Hydraulic controller	1973-10-30
Piston structure, particularly for hydraulic machines	1974-03-08
Hydraulic pump incorporating means for limiting volume of flow	1974-02-19
Radial balancing means for a hydraulic device	1974-12-09
Hydraulic wrench	1974-08-16
Hydraulic cow catch-carrier	1974-12-31
Hydraulic wheel	1974-06-25
Resonant gas-expansion engine with hydraulic energy conversion	1974-07-01
Control apparatus for an adjustable hydraulic machine driven by an adjustable driving motor	1974-12-11
Hydraulic fracturing process using reverse flow	1975-01-27
Differential pressure visual and audible warning signal device for hydraulic and pneumatic systems	1975-03-04
Central hydraulic system for marine deck equipment	1974-02-25
Hydraulic post setting and wire dispensing apparatus	1974-01-29
Automatic hydraulic hammer	1973-11-01
Hydraulic coupling fluid clutches	1974-08-19
Supporting arrangement for the rotor of a vertical electric machine such as hydraulic generator or the like	1975-01-10
Non-minimum phase linear controller for hydraulic mechanisms	1974-04-22
Hydraulic control system	1974-07-22
Hydraulic drive for the die closing unit of an injection molding machine	1975-01-31
Hydraulic pressure regulating system	1974-04-10
Variable hydraulic pumping apparatus	1974-04-16
Hydraulic tank reservoir pressure and vacuum stabilizer system	1974-02-19
Hydraulic pump control system	1974-10-18
Dual source hydraulic steering system	1974-09-09
Hydraulic composition	1974-04-01
Hydraulic brake booster with shut-off means	1974-02-01
Hydraulic coupling mechanism	1974-04-29
Hydraulic load sensing device	1974-07-10
Hydraulic actuating system for a pair of concurrently operating clutches or brakes	1973-09-07
Hydraulic mining nozzle-air lift device	1975-02-26
Hydraulic circuit for a pipelayer	1974-03-25
Adjustment means for roll crushers with gas hydraulic springs	1974-09-16
Fire-resistant hydraulic fluid	1974-03-25
Hydraulic punch press with ram orienting mechanism	1974-02-13
Linear hydraulic motor	1974-01-28
Hydraulic control valve for remote receiver	1973-08-21
Hydraulic hammer assembly	1974-11-13
Hydraulic system for braking truck engines	1975-01-24
Universal hydraulic lift attachment for tractors	1974-05-16
Non-hydraulic grouting composition of a water resistant polymer emulsion and a mixture of a coarse and a fine filler	1972-12-13
Hydraulic system for injection molding machine	1975-01-20
Hydraulic, automatically adjustable timing device for fuel injection	1974-09-30
Load and speed dependent gear change hydraulic pressure generator	1974-04-29
Hydraulic steering apparatus	1973-11-15
Automatic transmission hydraulic control throttle valve	1974-10-03
Hydraulic system	1974-05-07
Device for mounting spherical piston-rod ends of barrel-type hydraulic machine	1974-10-09
Magnetic hydraulic pump	1974-09-11
Reciprocating screw injection molding machine with hydraulic actuating mechanism with prefill valve	1974-06-26
Hydraulic fluid antioxidant system	1974-02-11