X-Patent
Refers to one of 2,845 early US patents whose records …
Category: Patents
X-Reference
A classification for prior art references established by WIPO in …
Y-Reference
A classification for prior art references established by WIPO in …
Refers to one of 2,845 early US patents whose records …
A classification for prior art references established by WIPO in …
A classification for prior art references established by WIPO in …