loadpatents
Patent applications and USPTO patent grants for Duffner; Brent.The latest application filed is for "rail fastening apparatus".
Patent | Date |
---|---|
Rail fastening apparatus Grant 11,168,446 - Duffner , et al. November 9, 2 | 2021-11-09 |
Railroad tie Grant D910,487 - Click , et al. February 16, 2 | 2021-02-16 |
Rail Fastening Apparatus App 20200063376 - Duffner; Brent ;   et al. | 2020-02-27 |
Boltless rail brace Grant 10,400,397 - Click , et al. Sep | 2019-09-03 |
Boltless Rail Brace App 20180282949 - Click; Gary ;   et al. | 2018-10-04 |
Dual independent control hydraulic switch machine Grant 9,352,762 - Click , et al. May 31, 2 | 2016-05-31 |
Spring wing controller Grant 9,290,192 - Click , et al. March 22, 2 | 2016-03-22 |
Spring Wing Controller App 20150159332 - CLICK; Gary ;   et al. | 2015-06-11 |
Dual Independent Control Hydraulic Switch Machine App 20140339373 - CLICK; Gary ;   et al. | 2014-11-20 |
Integrated Locking Control And Status Indicator For Manually Operated Railway Switch Stand App 20100072326 - Click; Gary ;   et al. | 2010-03-25 |
Insulated rail joint assembly Grant 7,677,466 - Click , et al. March 16, 2 | 2010-03-16 |
Insulated Rail Joint Assembly App 20070272762 - Click; Gary ;   et al. | 2007-11-29 |
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