Issued Patents All Time
Showing 26–26 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5308058 | Mailbox security door with automatic set lifter | Barry P. Mandel, Michael K. Sabocheck, Richard A. Van Dongen | 1994-05-03 |
HJ
Harold Halvorson, Jr.
A-Dec: 18 patents #4 of 90Top 5%
Steelcase Development: 4 patents #110 of 472Top 25%
Steelcase: 3 patents #288 of 809Top 40%
Overall (All Time): #154,738 of 4,157,543Top 4%
26
Patents All Time