Derwin; William J.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Derwin; William J..The latest application filed is for "method of installing a vertically extending member in an elevator system".
- Derwin; William J. - West Hartford CT
| Patent | Date |
|---|---|
| Method of installing a vertically extending member in an elevator system Grant 10,364,128 - Sheynkman , et al. July 30, 2 | 2019-07-30 |
| Method Of Installing A Vertically Extending Member In An Elevator System App 20170183200 - Sheynkman; Valery ; et al. | 2017-06-29 |
| Assembly for roping an elevator Grant 9,604,823 - Sheynkman , et al. March 28, 2 | 2017-03-28 |
| Lifting device clamp having a curvilinear surface Grant 8,714,537 - Smith , et al. May 6, 2 | 2014-05-06 |
| Lifting Device Clamp Having A Curvilinear Surface App 20100207311 - Smith; Jeffrey A. ; et al. | 2010-08-19 |
| Assembly For Roping An Elevator App 20100000823 - Sheynkman; Valery ; et al. | 2010-01-07 |
| SEC | 0001611438 | Derwin William J |
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