patent base

noun
variants: or patent block

Definition of patent base

: a base usually of metal and often in standard interchangeable units to which low-mounted or unmounted letterpress plates are secured in position for printing

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“Patent base.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/patent%20base. Accessed 16 Jul. 2020.

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