Carlstedt; Richard A.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Carlstedt; Richard A..The latest application filed is for "railcar draft gear spring assembly and method of making an elastomeric spring unit".
- Carlstedt; Richard A. - Wheaton IL
| Patent | Date |
|---|---|
| Railcar draft gear spring assembly and method of making an elastomeric spring unit Grant 8,365,930 - Carlstedt February 5, 2 | 2013-02-05 |
| Railcar elastomeric spring Grant 8,196,912 - Carlstedt , et al. June 12, 2 | 2012-06-12 |
| Railcar draft gear spring assembly and method of making an elastomeric spring unit App 20120118847 - Carlstedt; Richard A. | 2012-05-17 |
| Railcar elastomeric spring App 20100059470 - Carlstedt; Richard A. ; et al. | 2010-03-11 |
| Railroad car draft gear Grant 7,624,884 - Palermo , et al. December 1, 2 | 2009-12-01 |
| Railroad car draft gear App 20080290058 - Palermo; Michael R. ; et al. | 2008-11-27 |
| Draft gear for a reduced-slack drawbar assembly Grant 6,488,162 - Carlstedt December 3, 2 | 2002-12-03 |
| Railroad car draft gear having a long travel Grant 6,478,173 - Carlstedt November 12, 2 | 2002-11-12 |
| Railroad Car Draft Gear Having A Long Travel App 20020108920 - Carlstedt, Richard A. | 2002-08-15 |
| Elastomeric spring unit Grant 5,351,844 - Carlstedt October 4, 1 | 1994-10-04 |
| Friction elastomer draft gear Grant 4,960,215 - Carlstedt October 2, 1 | 1990-10-02 |
| Split wedge draft gear with center friction plate Grant 4,735,328 - Carlstedt April 5, 1 | 1988-04-05 |
| Draft gear for railroad car coupler system Grant 4,576,295 - Carlstedt March 18, 1 | 1986-03-18 |
| Draft gear Grant 4,556,149 - Carlstedt December 3, 1 | 1985-12-03 |
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