4. Communications: electrical
  5. Digital comparator systems

David Shapiro

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Adjustable multifunction ruler

Geometrical instruments – Straightedge type – Plural straightedges – relatively moveable
Reexamination Certificate

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Calculator for evaluating numerical answers to problems

Boots – shoes – and leggings
Patent

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Calculator for storing source data and evaluating numerical answ

Boots – shoes – and leggings
Patent

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Compass

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

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Compass

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

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Profile ID: LFUS-PAI-P-603990

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