Issued Patents All Time
Showing 1–24 of 24 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5301457 | Chair with insect repellant air jets | — | 1994-04-12 |
| 4691892 | Sign and sign stand | Ronald E. Grewe, David U. Hillstrom, Cecil E. Ursprung | 1987-09-08 |
| 4648169 | Method of mounting universal mounting bracket for gas pump toppers | David U. Hillstrom | 1987-03-10 |
| RE32359 | Portable wind-resistant sign stand with flexible sign | — | 1987-02-24 |
| 4619220 | Collapsible sign with flags | Jerry A. McCabe | 1986-10-28 |
| 4593879 | Compact sign stand | Cecil E. Ursprung | 1986-06-10 |
| 4592530 | Universal mounting bracket for gas pump toppers | David U. Hillstrom | 1986-06-03 |
| 4592158 | Roll-up sign with attachment strips | — | 1986-06-03 |
| 4580361 | Display tensioning frame | Kevin Hillstrom | 1986-04-08 |
| 4575040 | Deflectable sign and stand | — | 1986-03-11 |
| 4572473 | Deflectable sign and stand | — | 1986-02-25 |
| D282611 | Freestanding display rack for rolled material | — | 1986-02-18 |
| D282512 | Display rack for rolled material | — | 1986-02-11 |
| 4569499 | Deflectable sign and stand | — | 1986-02-11 |
| 4548379 | Compact sign and stand | Cecil E. Ursprung | 1985-10-22 |
| 4544125 | Sign bracket | — | 1985-10-01 |
| 4523400 | Plastic biased poster frame | — | 1985-06-18 |
| 4519152 | Tamper proof poster display device | Robert Sarkisian | 1985-05-28 |
| 4516344 | Portable wind-resistant sign stand with flexible sign | — | 1985-05-14 |
| 4512094 | Plastic poster frame with articulated bias member | — | 1985-04-23 |
| 4512095 | Hinged plastic biased poster frame | — | 1985-04-23 |
| 4509714 | Portable wind-resistant sign stand with flexible bow-type legs | — | 1985-04-09 |
| 4507887 | Sign and attachment apparatus | — | 1985-04-02 |
| 4310991 | Door sealing system | — | 1982-01-19 |