4. Geometrical instruments

Douglas R. Hoffman

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Germicidal face mask

Surgery – Respiratory method or device – Face mask covering a breathing passage
Reexamination Certificate

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Latching slotted beam terminal

Geometrical instruments
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Use of sonication to eliminate prions

Chemical apparatus and process disinfecting – deodorizing – preser – Process disinfecting – preserving – deodorizing – or sterilizing – Using sonic or ultrasonic energy
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1038474

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