4. Measuring, testing, or signalling instruments
  5. Measuring, regulating or indicating instrument, or casing
  6. Weight, force or density

Nelson C. Roltje

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Base for a pH meter electrode arm

Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Weight – force or density
Patent

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Quahog sizing ring

Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Geometric
Patent

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Writing instrument cap

Office supplies; artists and teachers materials – Equipment for writing – drawing – or for fine arts – Element or attachment
Patent

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Profile ID: LFUS-PAI-P-702802

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