D-Mark, Inc.
Chesterfield, MI, US· latest recorded location
D-Mark, Inc. is named on 4 US grants and 0 published applications in this corpus. Its most frequent classification is B01D (Separation).
- Granted patents
- 4
- Published applications
- 0
- Inventors
- 5
- Granted in 2026 so far
- 0
- Most recent grant
- 16 Aug 1994
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1980 | 1 | 0 |
| 1981 | 0 | 0 |
| 1982 | 0 | 0 |
| 1983 | 0 | 0 |
| 1984 | 0 | 0 |
| 1985 | 0 | 0 |
| 1986 | 0 | 0 |
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 0 | 0 |
| 1991 | 0 | 0 |
| 1992 | 1 | 0 |
| 1993 | 0 | 0 |
| 1994 | 1 | 0 |
By publication year.
Technology areas
Share of 4 documents
Recent patents
- Filter and method of making same16 Aug 1994US 5,338,340 A
- Filter and method of making same23 Jun 1992US 5,124,177 A
- Method of making a gas phase permeable filter13 Oct 1987US 4,699,681 A
- Gas phase permeable filter14 Oct 1980US 4,227,904 A
No published applications.
Most cited
By later US patents