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GB733211A
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Device for truing profile grinding wheels
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GB710321A
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Portable apparatus for making micro-abrasion cuts
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GB700058A
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Hardness indenter block
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US2654979A
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Method of and device for producing specifically oriented polished faces on diamonds
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US2672046A
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Apparatus for testing the wear and abrasion resistance of materials
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US2713259A
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Apparatus for testing the hardness of materials
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GB665429A
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Apparatus for testing the wear and abrasion resistance of hard materials
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GB668750A
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Apparatus for testing the hardness of materials
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GB651800A
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Improvements in hardness testing, in particular in micro-hardness testing
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GB600133A
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Improvements in the abrasion testing of hard materials and particularly diamonds
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GB593813A
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Epicyclic gear mechanism for varying angular velocity
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GB561067A
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Improvements in eccentric gear mechanism
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GB554147A
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Improvements in cam clamping devices
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