4. Office supplies; artists and teachers materials
  5. Teaching material
  6. Sensory feedback, e.g., audio-visual teaching machine

David Cheung

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Apparatus and methods for upgraded substrate processing system w

Adhesive bonding and miscellaneous chemical manufacture – Differential fluid etching apparatus – With microwave gas energizing means
Patent

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Apparatus and methods for upgraded substrate processing...

Coating apparatus – Gas or vapor deposition – With treating means
Reexamination Certificate

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Apparatus and methods for upgraded substrate processing...

Etching a substrate: processes – Gas phase etching of substrate – Application of energy to the gaseous etchant or to the...
Reexamination Certificate

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Apparatus for cleaning an exhaust line in a semiconductor...

Hazardous or toxic waste destruction or containment – Apparatus
Reexamination Certificate

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Apparatus for depositing high deposition rate halogen-doped...

Coating apparatus – Interfacing control of plural operations
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Profile ID: LFUS-PAI-P-67871

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