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Double screw rotor assembly

Rotary expansible chamber devices – Interengaging rotating members – Each tapered
Reexamination Certificate

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Double screw rotor assembly having means to automatically...

Rotary expansible chamber devices – Interengaging rotating members – Each tapered
Reexamination Certificate

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Non-lubricated screw machine with a rotor having a taper and var

Rotary expansible chamber devices – Interengaging rotating members – Each tapered
Patent

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Nonlubricated screw fluid machine

Rotary expansible chamber devices – Interengaging rotating members – Each tapered
Patent

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Pressure sealed tapered screw pump/motor

Rotary expansible chamber devices – Interengaging rotating members – Each tapered
Reexamination Certificate

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Screw pumps

Rotary expansible chamber devices – Interengaging rotating members – Each tapered
Reexamination Certificate

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Vacuum pumps

Rotary expansible chamber devices – Interengaging rotating members – Each tapered
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Vacuum pumps

Rotary expansible chamber devices – Interengaging rotating members – Each tapered
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Vacuum pumps

Rotary expansible chamber devices – Interengaging rotating members – Each tapered
Patent

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Vacuum pumps

Rotary expansible chamber devices – Interengaging rotating members – Each tapered
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Volumetric machine with conical screws

Rotary expansible chamber devices – Interengaging rotating members – Each tapered
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