Dev-Mark, Inc.
North Aurora, IL, US· latest recorded location
Dev-Mark, Inc. is named on 3 US grants and 0 published applications in this corpus. Its most frequent classification is B61D (Body details or kinds of railway vehicles).
- Granted patents
- 3
- Published applications
- 0
- Inventors
- 2
- Granted in 2026 so far
- 0
- Most recent grant
- 8 Jul 1997
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1985 | 1 | 0 |
| 1986 | 0 | 0 |
| 1987 | 0 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 0 | 0 |
| 1993 | 0 | 0 |
| 1994 | 0 | 0 |
| 1995 | 1 | 0 |
| 1996 | 0 | 0 |
| 1997 | 1 | 0 |
By publication year.
Technology areas
Share of 3 documents
Recent patents
- Railroad car hatch cover8 Jul 1997US 5,644,990 A
- Railroad car hatch cover mechanism with dual latch positions for safely venting hatch8 Aug 1995US 5,438,935 A
- Hatch cover seal assembly1 Oct 1985US 4,543,889 A
No published applications.
Most cited
By later US patents