4. Chemistry of inorganic compounds
  5. Modifying or removing component of normally gaseous mixture
  6. Sulfur or sulfur containing component

Richard A. Gregory

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Light barrier for reopening elevator doors

Electricity: motive power systems – Automatic and/or with time-delay means – Radiant energy
Patent

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Process for absorption of mercaptans

Chemistry of inorganic compounds – Modifying or removing component of normally gaseous mixture – Sulfur or sulfur containing component
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Vandal resistant push button assembly

Electricity: circuit makers and breakers – Electric switch details – Actuators
Patent

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Profile ID: LFUS-PAI-P-1264724

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