| 11713608 |
Door monitoring system |
Patricia Yulkowski, Leon Yulkowski |
2023-08-01 |
| 11061392 |
Smart HVAC manifold system |
Timothy Vielhaber, David Rodgers, John Podhradsky, James L. Bergmann, William P. Spohn +2 more |
2021-07-13 |
| 11028630 |
Door monitoring system |
Patricia Yulkowski, Leon Yulkowski |
2021-06-08 |
| 10663959 |
Smart HVAC manifold system |
Timothy Vielhaber, David Rodgers, John Podhradsky, James L. Bergmann, William P. Spohn +2 more |
2020-05-26 |
| 10452061 |
Smart HVAC manifold system |
Timothy Vielhaber, David Rodgers, John Podhradsky, James L. Bergmann, William P. Spohn +2 more |
2019-10-22 |
| 10430737 |
Restroom convenience center |
Peter Jährling |
2019-10-01 |
| 10415294 |
Door monitoring system |
Patricia Yulkowski, Leon Yulkowski |
2019-09-17 |
| D852161 |
Audio electronic device |
John Edward Hannibal, III, Rhonda Sue Buynak, Patrick W. Brown |
2019-06-25 |
| 10024096 |
Door monitoring system |
Patricia Yulkowski, Leon Yulkowski |
2018-07-17 |
| 9536357 |
Door monitoring system |
Patricia Yulkowski, Leon Yulkowski |
2017-01-03 |
| 8907791 |
Door monitoring system |
Patricia Yulkowski, Leon Yulkowski |
2014-12-09 |
| 8653982 |
Door monitoring system |
Patricia Yulkowski, Leon Yulkowski |
2014-02-18 |
| 8364546 |
Restroom convenience center |
Peter Jährling |
2013-01-29 |
| 7177725 |
System for the monitor and control of rest rooms |
Richard A. Nortier, William O. Limkemann |
2007-02-13 |
| 6259352 |
Door lock system |
Leon Yulkowski |
2001-07-10 |