United States. Patent Office · Washington, D.C., Govt. Print. Off. · leaf 767
n of an excessively finely dividedcement, then in allowing the cement to set 100and harden, then in separating the resultingmatrix from the master, and in finally forci-bly impressing the matrix upon a mass ofhot plastic material, substantially as setforth. 105 This specification signed and… … -J^ Z- J^^J
Phonograph · Patents
Internet Archive · Smithsonian Libraries · Public Domain Mark 1.0. Free to use for anything.
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