Inventor · Collegeville, PA, US

William E. Duffield

29Patents

15h-index

20Co-inventors

77Inventor score

Filing activity: Oct 11, 2005 → Jun 24, 2020

Most-cited inventions

Patent	Title	Area	Cited by	Status
US8876866B2	Spinous process fusion devices and methods thereof	Human Necessities	223	Active
US8328872B2	Intervertebral fusion implant	Human Necessities	218	Active
US8641768B2	Intervertebral fusion implant	Human Necessities	97	Active
US8709083B2	Intervertebral fusion implant	Human Necessities	81	Active
US9358127B2	Intervertebral fusion implant	Human Necessities	75	Active
US9364343B2	Intervertebral fusion implant	Human Necessities	51	Active
US9675467B2	Intervertebral fusion implant	Human Necessities	48	Active
US9615936B2	Intervertebral fusion implant	Human Necessities	40	Active
US9833333B2	Intervertebral fusion implant	Human Necessities	36	Active
USD623750S1	Intervertebral fusion implant	General	30	Expired
US10575960B2	Intervertebral fusion implant	Human Necessities	30	Active
US9987141B2	Intervertebral fusion implant	Human Necessities	29	Active
US9925064B2	Intervertebral fusion implant	Human Necessities	28	Active
US8167948B2	Anterior prosthetic spinal disc replacement	Human Necessities	21	Active
US8926664B1	Laminoplasty fixaction devices	Human Necessities	18	Active
US7892262B2	Posterior prosthetic spinal disc replacement and methods thereof	Human Necessities	12	Active
US9179944B2	Spinous process fusion devices	Human Necessities	9	Active
US9486253B2	Laminoplasty fixation devices	Human Necessities	3	Active
US9681898B2	Spinous process fusion devices and methods thereof	Human Necessities	3	Active
US9675388B2	Spinous process fusion devices	Human Necessities	2	Active
US9592082B2	Spinous process fusion devices	Human Necessities	2	Active
US10568665B2	Laminoplasty fixation devices	Human Necessities	1	Active
US9402656B2	Spinous process fusion devices	Human Necessities	1	Active
US10085777B2	Spinous process fusion devices	Human Necessities	1	Active
US10213235B2	Spinous process fusion devices and methods thereof	Human Necessities	1	Active

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.