Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11294989 | Content usage monitor | David John Butcher, Rhys David Copeland, Robert James Catherall | 2022-04-05 |
| 10102352 | Content usage monitor | David John Butcher, Rhys David Copeland, Robert James Catherall | 2018-10-16 |
| 9340948 | Explosion mitigating vault | James Allen, Kevin J. Wright, Dean W. Reynolds | 2016-05-17 |
| D732944 | Security bolt | Kevin S. Vrondran | 2015-06-30 |
| 9004810 | Explosion mitigating cover | Dean W. Reynolds, James Allen | 2015-04-14 |
| 8784000 | Explosion mitigating cover | Dean W. Reynolds, James Allen | 2014-07-22 |
| 8727659 | Manhole cover with insert | Dean W. Reynolds | 2014-05-20 |
| 8714867 | Explosion mitigating cover | Kevin S. Vrondran, Dean W. Reynolds, Scott B. Beal | 2014-05-06 |
| 8449216 | Manhole cover safety device | Kevin S. Vrondran, Scott B. Beal, David E. Fuller, Dennis E. Webb | 2013-05-28 |
| 8230972 | Tree stand | — | 2012-07-31 |
| 8206058 | Manhole cover hinge assembly | Kevin S. Vrondran, David E. Fuller | 2012-06-26 |
| 8021380 | Obstruction removal system | Dustin Thompson, D. H. Perkins, Michele Silver, Kevin Mauch, Patrick Macaulay | 2011-09-20 |
| 8010849 | Diagnosing faults within programs being executed by virtual machines | David John Butcher, Sidath A. Senanayake | 2011-08-30 |
| 7905679 | Dual lifting manhole cover | Kevin S. Vrondran, Andrew J. Malpass | 2011-03-15 |
| 7832958 | Swing-out manhole cover | Lee M. Veldboom, Kevin S. Vrondran | 2010-11-16 |
| 7726903 | Manhole system | Kevin S. Vrondran, David E. Fuller | 2010-06-01 |
| 7712515 | Municipal casting frame and method of manufacturing same | Leon P. Sulak, Brian J. Rachwitz, Keith A. Gee, Paul F. Harm | 2010-05-11 |
| 7506667 | Flex stack | Chengappalli P. Gopalakrishnan | 2009-03-24 |
| 7341398 | Lift-assisted manhole cover | Lee M. Veldboom, Scott B. Beal, Herbert Carl Barnum, William R. Austin, James F. Malpass +4 more | 2008-03-11 |
| 7331621 | Dump box | — | 2008-02-19 |
| D492425 | Grate | — | 2004-06-29 |
| D489833 | Tree grate portion | Michele S. Brody | 2004-05-11 |
| 6230646 | Deep ocean, mid-water farming apparatus | Michael R. Berry | 2001-05-15 |