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GB710907A
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Improvements in apparatus for and method of extracting water from paper stock
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US2714839A
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Apparatus for extracting water from paper stock
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US2652126A
|
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Sound-absorbing structure
|
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US2390262A
|
|
Acoustical structure
|
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US2149400A
|
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Packaging machine
|
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US2209825A
|
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Structure for absorbing sound
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US2077889A
|
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Acoustical construction
|
|
US1883386A
|
|
Sound absorbing unit and method of making same
|
|
US1961374A
|
|
Sound-absorbing structure
|
|
US1952766A
|
|
Sound absorbing material and method of making the same
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US2001916A
|
|
Sound absorbing material
|
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US1925453A
|
|
Sound absorbing structure
|
|
US1839404A
|
|
Wall-forming material and method of making the same
|
|
US1483366A
|
|
Sound-absorbing method and material
|
|
US1437537A
|
|
Machine for making plastic blocks
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US1483365A
|
|
Sound-absorbing method and material
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