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In reference to the patent: US3498685

What are the companies names that use this patent?

Thank you

closed as off-topic by DonQuiKong, Robert Cartaino Sep 4 '17 at 18:51

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "This question does not appear to be about patents within the scope defined in the help center." – DonQuiKong, Robert Cartaino
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