|
GB629222A
|
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Improvements in or relating to entrance hatches for poultry houses
|
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GB628671A
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Improvements in and relating to machines for the mining of coal and the like
|
|
GB622964A
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An improved mechanical hammer
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GB622923A
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Improvements in and relating to machines for the mining of coal and the like
|
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GB595653A
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Improvements in or relating to electromagnetic waveguides
|
|
GB493555A
|
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An improved lubricator for the axles of pit tubs and the like
|
|
US2057761A
|
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Friction clutch
|
|
GB441897A
|
|
An improved friction clutch
|
|
GB425374A
|
|
Improvements in or relating to friction clutches
|
|
IE12725L
|
|
Automatic friction clutch
|
|
US1906522A
|
|
Automatic friction clutch
|
|
GB374547A
|
|
An improved automatic friction clutch
|
|
IE11228L
|
|
Clutches
|
|
GB331905A
|
|
An improved automatic friction clutch
|
|
GB266146A
|
|
An improved lubricator for the axles of pit tubs and the like
|
|
GB252917A
|
|
An improved lubricator
|
|
GB245573A
|
|
Improvements in and relating to sheaves or rollers
|
