Duncan; Robert H.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Duncan; Robert H..The latest application filed is for "non-flammable, non-aqueous group ivb metal alkoxide crosslinkers and fracturing fluid compositions incorporating same".
- Duncan; Robert H. - Cleveland GB
- Duncan; Robert H. - Memphis TN
| Patent | Date |
|---|---|
| Non-flammable, non-aqueous group IVB metal alkoxide crosslinkers and fracturing fluid compositions incorporating same Grant 7,879,771 - Vaughn , et al. February 1, 2 | 2011-02-01 |
| Non-flammable, non-aqueous group IVB metal alkoxide crosslinkers and fracturing fluid compositions incorporating same App 20090288828 - Vaughn; Derek E. ; et al. | 2009-11-26 |
| Handsfree telephone instrument using digital dial Grant 4,496,799 - Kingen , et al. January 29, 1 | 1985-01-29 |
| Telephone station circuit using digital tone generation Grant 4,406,926 - Duncan September 27, 1 | 1983-09-27 |
| Hotel/motel Room Status System Grant 3,742,141 - Duncan , et al. June 26, 1 | 1973-06-26 |
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