FR1532051A
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Improvements to percussion tools
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FR1532052A
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Rock hammer improvements
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FR1531077A
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Percussion tools and machines
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FR1531075A
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Improvements to tools and percussion machines
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FR1531076A
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Advanced percussion tools and machines
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FR1531078A
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Improvements to percussion machines and tools
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GB1124528A
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Improvements in or relating to percussive tools and machines
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GB1124527A
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Improvements in or relating to percussive tools and machines
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GB1124526A
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Improvements in or relating to percussive tools and machines
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GB1124529A
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Improvements in or relating to percussive tools and machines
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US3297842A
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Motor control gear
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FR1403274A
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Improvements to control mechanisms
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GB1045913A
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Improvements in or relating to control gear for motor driven equipment
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FR1332285A
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Variable pressure fluid flow device
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FR1332283A
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Improvements in sonic pulse generator and transmitter devices
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FR1332284A
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Hydraulic control device
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US3208356A
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Hydraulic power systems
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GB952403A
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Improvements in or relating to fluctuating pressure sonic power systems
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GB934940A
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Improvements in devices for damping pressure fluctuations in hydraulic systems
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GB941138A
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Improvements in or relating to hydraulic power control systems
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