Issued Patents All Time
Showing 26–50 of 60 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7674071 | Method of beach renourishment using sand-entrapping wattles | J. Tad Heyman | 2010-03-09 |
| 7563364 | Curb inlet filter | J. Tad Heyman, Phyl Kimball, Laurence M. Bierce | 2009-07-21 |
| 7404892 | Storm water catch basin filter comprising an anti-microbial agent | J. Tad Heyman, Laurence M. Bierce | 2008-07-29 |
| 7231924 | Deodorizer for cigarette butt collection containers | J. Tad Heyman, Laurence M. Bierce | 2007-06-19 |
| 7166800 | Macroencapsulation container having both releasable and permanent sealing means | J. Tad Heyman, Laurence M. Bierce | 2007-01-23 |
| 7073800 | Child carrier attachment for shopping carts | J. Tad Heyman, Laurence M. Bierce | 2006-07-11 |
| 6838617 | Macroencapsulation container having both releasable and permanent sealing means | J. Tad Heyman, Laurence M. Bierce | 2005-01-04 |
| 6811708 | Curb guard filter | J. Tad Heyman, Laurence M. Bierce | 2004-11-02 |
| 6585008 | Method and apparatus for breaching and venting sealed inner containers within a drum | J. Tad Heyman, Laurence M. Bierce | 2003-07-01 |
| 6550492 | Filter vent fitting | J. Tad Heyman, Laurence M. Bierce | 2003-04-22 |
| 6530722 | Drain sealing device | J. Tad Heyman, Laurence M. Bierce | 2003-03-11 |
| 6435226 | Method and apparatus for breaching and venting sealed inner containers within a drum | J. Tad Heyman, Laurence M. Bierce | 2002-08-20 |
| 6305569 | Spill containment pan | Laurence M. Bierce, J. Tad Heyman | 2001-10-23 |
| 6173856 | Spill containment pan | Laurence M. Bierce, J. Tad Heyman | 2001-01-16 |
| 6092686 | Collapsible liquid containment device | J. Tad Heyman, Laurence M. Bierce | 2000-07-25 |
| 5924461 | Liquid containment apparatus with flexible side wall | J. Tad Heyman, Laurence M. Bierce | 1999-07-20 |
| 5891223 | Multi-stage vent filter | Laurence M. Bierce, J. Tad Heyman | 1999-04-06 |
| 5813680 | Hand truck with expandable secondary containment reservoir | J. Tad Heyman, Laurence M. Bierce | 1998-09-29 |
| 5642834 | Secondary containment reservoir device | J. Tad Heyman, Laurence M. Bierce, Jesse Ehredt | 1997-07-01 |
| 5636753 | Stabilizer for plural drum stacks | Dennis Wilkinson, Laurence M. Bierce, J. Tad Heyman | 1997-06-10 |
| 5615608 | Reinforced containment pallet | J. Tad Heyman, Laurence M. Bierce, Jesse Ehredt | 1997-04-01 |
| 5577539 | Drum-top drainfield funnel | J. Tad Heyman, Laurence M. Bierce, Jesse Ehredt | 1996-11-26 |
| D364629 | Drum top drainfield funnel | J. Tad Heyman, Laurence M. Bierce, Jesse Ehredt | 1995-11-28 |
| D364255 | Single drum collection container | J. Tad Heyman, Laurence M. Bierce, Jesse Ehredt | 1995-11-14 |
| 5429437 | Collapsible, self-expanding liquid container | J. Tad Heyman, Laurence M. Bierce, Dorian Thurston True, Marion Lee Jones | 1995-07-04 |