|
US2157626A
|
|
Oil retainer
|
|
US2061328A
|
|
Art of lubrication
|
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US2012974A
|
|
Oil seal
|
|
US1989110A
|
|
Oil seal and dust guard
|
|
US1967255A
|
|
Lubricant and process of making same
|
|
US2009323A
|
|
Lubricating device
|
|
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|
|
Process for treating oils
|
|
US2003120A
|
|
Oil seal and dust guard for journal boxes
|
|
US1995324A
|
|
Oxidizing petroleum and the products thereof
|
|
US2112250A
|
|
Process of making oxidized products
|
|
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|
|
Process of making oxidized products
|
|
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|
|
Method of cracking hydrocarbon oils
|
|
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|
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Production of ferrosilicon aluminum
|
|
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Apparatus for cracking oils
|
|
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|
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Temperature-controlling device.
|
|
US902600A
|
|
Valve-controlling apparatus.
|
|
US764863A
|
|
Process of extracting resinous matter from long-leaf or pitch pine.
|
|
US766841A
|
|
Process of producing high temperature by the use of steam without the production of high pressure.
|
|
CA308823A
|
|
Oil seal and dust guard
|
|
CA313930A
|
|
Lubricating device
|
