| 11761165 |
Manhole cover |
— |
2023-09-19 |
| 10935159 |
Locking security cover for a valve box |
— |
2021-03-02 |
| 10845570 |
Optical device for enhancing resolution of an image |
Manuel Aschwanden, David Niederer, Mark Ventura, Marcel Suter, Stephan SMOLKA +2 more |
2020-11-24 |
| 10480679 |
Security cover for a valve box with a positively operated automatically lubricated locking mechanism |
— |
2019-11-19 |
| 9863115 |
Controlled pressure release manhole cover assembly |
— |
2018-01-09 |
| 9790714 |
Locking cover assembly for preventing unauthorized access to a utility shut off valve |
— |
2017-10-17 |
| 9416516 |
Pressure responsive locking latch arrangement for manhole covers |
— |
2016-08-16 |
| 8794865 |
Bollard assembly |
— |
2014-08-05 |
| 7891904 |
Manhole cover stop mechanism |
— |
2011-02-22 |
| 7712995 |
Method of controllably venting gases generated by explosions in a manhole space |
— |
2010-05-11 |
| 7484908 |
Manhole cover security lock with controlled pressure release |
— |
2009-02-03 |
| 7244075 |
Telescoping bollard with screw drive |
— |
2007-07-17 |
| 6764261 |
Locking device and method for catch basin and manhole covers, and the like |
— |
2004-07-20 |
| 5750014 |
Apparatus for selectively coating metal parts |
Jeffrey R. Pernick |
1998-05-12 |
| 5559491 |
Automatically armed vehicle anti-theft system |
— |
1996-09-24 |
| 5534126 |
Apparatus and method for selective coating of metal parts |
Jeffrey R. Pernick |
1996-07-09 |
| 5394135 |
Automatically armed vehicle anti-theft system |
— |
1995-02-28 |
| 5172094 |
Automatically armed vehicle anti-theft system |
— |
1992-12-15 |
| 5161939 |
Air compression system |
— |
1992-11-10 |