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Leveraging back-off grammars for authoring context-free grammars Grant US-8862468-B2 United States of America 14 Oct 2014
Language model generating device, method thereof, and recording medium storing program… Grant US-8831945-B2 United States of America 09 Sep 2014
LEVERAGING BACK-OFF GRAMMARS FOR AUTHORING CONTEXT-FREE GRAMMARS Application US-20120095752-A1 United States of America 19 Apr 2012