Durfee; William K.

Patent Applications and Registrations

Patent applications and USPTO patent grants for Durfee; William K..The latest application filed is for "wheelchair propulsion assistance devices and systems".

Company Profile

0.7.7

Durfee; William K. - Minneapolis MN
Durfee; William K. - Edina MN US
Durfee; William K. - Cambridge MA

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Wheelchair Propulsion Assistance Devices And Systems App 20210282986 - Goldish; Gary ; et al.	2021-09-16
Portable active pneumatically powered ankle-foot orthosis Grant 9,480,618 - Hsiao-Wecksler , et al. November 1, 2	2016-11-01
Apparatus for and product method of making a frozen confectionery Grant 8,778,436 - Waletzko , et al. July 15, 2	2014-07-15
Portable Active Pneumatically Powered Ankle-foot Orthosis App 20120289870 - Hsiao-Wecksler; Elizabeth T. ; et al.	2012-11-15
Apparatus for and product method of making a frozen confectionery App 20110064858 - Waletzko; David ; et al.	2011-03-17
Aneurysm Treatment System, Device And Method App 20100274276 - Chow; Ricky ; et al.	2010-10-28
Apparatus for and method of making a frozen confectionery product Grant 7,754,266 - Waletzko , et al. July 13, 2	2010-07-13
Sensory Coordination System for Sports, Therapy and Exercise App 20090117525 - Bavaro; Louis M. ; et al.	2009-05-07
Ureteral Stent With Axial And Radial Variability App 20080183299 - Monga; Manoj ; et al.	2008-07-31
Apparatus for and method of making a frozen confectionery product App 20060110515 - Waletzko; David ; et al.	2006-05-25
Radio frequency ablation apparatus with remotely articulating and self-locking electrode wand Grant 6,423,059 - Hanson , et al. July 23, 2	2002-07-23
Light control system Grant 4,095,139 - Symonds , et al. June 13, 1	1978-06-13

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