4. Geometrical instruments
  5. Area integrators
  6. Electrical

Robert A. Campbell

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Cigarette filter holders with optional snorkel bypass accessory

Tobacco – Tobacco users' appliance – Device used for smoking
Patent

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Distance measuring instrument

Geometrical instruments – Area integrators – Electrical
Patent

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Universal adjustable telephone handset holder

Patent

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Universal remote control system

Interactive video distribution systems – Video distribution system components – Receiver
Reexamination Certificate

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Universal remote control system

Communications: electrical – Continuously variable indicating – With meter reading
Reexamination Certificate

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Profile ID: LFUS-PAI-P-492494

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