Inventor
HOFSTATTER DAVID F
US32 patents
⚠️ This page may combine multiple inventors who share the name “HOFSTATTER DAVID F”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CALLWAVE COMMUNICATIONS LLC
10 patentsUS8774785B1Jul 8, 2014
Methods and systems for blocking unwanted communications
CALLWAVE COMMUNICATIONS LLC17 citations93
US9319523B2Apr 19, 2016
Methods and apparatus for providing expanded telecommunications service
CALLWAVE COMMUNICATIONS LLC18 citations92
US9838542B1Dec 5, 2017
Methods and systems for managing communications
CALLWAVE COMMUNICATIONS LLC10 citations84
US9413885B1Aug 9, 2016
Methods and systems for blocking unwanted communications
CALLWAVE COMMUNICATIONS LLC10 citations84
US8891753B2Nov 18, 2014
Methods and apparatus for providing expanded telecommunications service
CALLWAVE COMMUNICATIONS LLC8 citations84
US9491297B1Nov 8, 2016
Methods and systems for managing telecommunications
CALLWAVE COMMUNICATIONS LLC2 citations63
US9258412B1Feb 9, 2016
Enhanced service levels for call-processing services
CALLWAVE COMMUNICATIONS LLC1 citations63
US8958782B1Feb 17, 2015
Methods and systems for blocking unwanted communications
CALLWAVE COMMUNICATIONS LLC2 citations63
US8750469B1Jun 10, 2014
Methods and systems for call processing
CALLWAVE COMMUNICATIONS LLC1 citations61
US8929258B1Jan 6, 2015
Enhanced service levels for call-processing services
CALLWAVE COMMUNICATIONS LLC0 citations52
CALLWAVE INC
8 patentsUS7555110B2Jun 30, 2009
Methods and apparatus for providing expanded telecommunications service
CALLWAVE INC194 citations99
US6898275B2May 24, 2005
Method and apparatus for providing expanded telecommunications service
CALLWAVE INC212 citations99
US6477246B1Nov 5, 2002
Method and apparatus for providing expanded telecommunications service
CALLWAVE INC320 citations99
US8000455B1Aug 16, 2011
Methods and systems for call processing
CALLWAVE INC52 citations96
US7480065B1Jan 20, 2009
Facsimile telecommunications system and method
CALLWAVE INC46 citations96
US7397910B2Jul 8, 2008
Method and apparatus for providing expanded telecommunications service
CALLWAVE INC43 citations96
US7688958B2Mar 30, 2010
Methods and apparatus for providing expanded telecommunications service
CALLWAVE INC70 citations95
US7742586B1Jun 22, 2010
Enhanced service levels for call-processing services
CALLWAVE INC26 citations91
KIRCHHOFF LELAND W
4 patentsUS8548447B1Oct 1, 2013
Methods and systems for blocking unwanted telecommunications
KIRCHHOFF LELAND W33 citations96
US8214338B1Jul 3, 2012
Methods and systems for media storage
KIRCHHOFF LELAND W49 citations94
US8325886B1Dec 4, 2012
Methods and systems for managing telecommunications
KIRCHHOFF LELAND W18 citations92
US8526582B1Sep 3, 2013
Methods and systems for managing telecommunications
KIRCHHOFF LELAND W6 citations84
TRANDAL DAVID S
4 patentsUS8400664B2Mar 19, 2013
Facsimile telecommunications system and method
TRANDAL DAVID S5 citations84
US8081337B2Dec 20, 2011
Facsimile telecommunications system and method
TRANDAL DAVID S5 citations74
US8670536B1Mar 11, 2014
Enhanced service levels for call-processing services
TRANDAL DAVID S0 citations50
US8165278B2Apr 24, 2012
Enhanced service levels for call-processing services
TRANDAL DAVID S0 citations50
DOLAN ROBERT A
3 patentsUS8325901B1Dec 4, 2012
Methods and apparatus for providing expanded telecommunications service
DOLAN ROBERT A29 citations92
US8594287B2Nov 26, 2013
Methods and apparatus for providing expanded telecommunications service
DOLAN ROBERT A7 citations81
US8401164B1Mar 19, 2013
Methods and apparatus for providing expanded telecommunications service
DOLAN ROBERT A0 citations51