Assertion: gypsum's patent | /r/CapableOf | cover process
Facets:
value: on gypsum board
type: LOCATION
value: with closed edges
type: MANNER
Source sentences:
text: The patents were numerous, and covered not only the patented board, but machines and processes in the manufacture of board, and the rights and privileges granted were of great value to the manufacturers of gypsum board.
text: In 1912, United States Gypsum acquired a patent covering both process and product claims on gypsum board with closed edges, the paper liner being folded over the exposed gypsum core.