| 9689187 |
Multiple direction railroad gate release mechanism |
— |
2017-06-27 |
| 8640996 |
Multiple direction railroad gate release mechanism |
— |
2014-02-04 |
| 8485478 |
System and method for servicing a breakaway gate |
— |
2013-07-16 |
| 8240618 |
Multiple direction railroad gate release mechanism |
— |
2012-08-14 |
| 6755590 |
Box tube clamping system |
Richard L. Luetzow |
2004-06-29 |
| 6672008 |
Gate release mechanism having a pivotable arm to facilitate maintenance |
Richard L. Luetzow |
2004-01-06 |
| 6597558 |
Solenoid system |
Richard L. Luetzow |
2003-07-22 |
| 6470626 |
Gate release mechanism with detent and plunger, and gate incorporating same |
Richard L. Luetzow |
2002-10-29 |
| 6357701 |
Warning light having a switching system |
Richard L. Luetzow |
2002-03-19 |
| 6310529 |
Bi-stable battery switch |
Richard L. Luetzow |
2001-10-30 |
| 5264792 |
Hall effect position sensor with flux limiter and magnetic dispersion pole piece |
Robert H. Luetzow |
1993-11-23 |
| 5245132 |
Noble plated tungsten corona wire for copy machines or xerography technology machines |
— |
1993-09-14 |
| 5115194 |
Hall effect position sensor with flux limiter and magnetic dispersion means |
Robert H. Luetzow |
1992-05-19 |
| 4656448 |
Solenoid for use in harsh environment conditions |
— |
1987-04-07 |
| 4616717 |
Flexible wire cable and process of making same |
— |
1986-10-14 |
| 4489231 |
Method for preparing electrical conductor |
— |
1984-12-18 |
| 4375379 |
Process of making a multiple conductor flexible wire cable |
— |
1983-03-01 |