Inventor
Kurt Schafer
Inventor
Krefeld, DE
Overview
Patents· 4 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
C01Pprimary
C01PIndexing scheme relating to structural and physical aspects of solid inorganic compounds25%
C09CTreatment of inorganic materials, other than fibrous fillers, to enhance their pigmenting or filling properties25%
C04BLime, magnesia13%
F16DCouplings for transmitting rotation13%
G06FElectric digital data processing13%
Y10TTechnical subjects covered by former us classification13%
PatentTitleYear
9,606,700'Selection of hierarchically organized items'20175,199,986'Process for coloring building materials'19935,174,008'Method of assembling pressure plate units of motor vehicle friction clutches'19925,013,365'Iron oxide black pigments, processes for their preparation and their use'1991Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1991–1993Patents assigned to BAYER AG (2)· patent assignee history
1991–1993Based in Krefeld, DE· patent location history
1992Patents assigned to FICHTEL & SACHS AG (1)· patent assignee history
1992Based in Schweibheim, DE· patent location history
2017Patents assigned to INFORMATION RESOURCES INC (1)· patent assignee history
2017Based in Chicago, IL, US· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| BAYER AG | 2 | 1991–1993 |
| FICHTEL & SACHS AG | 1 | 1992 |
| INFORMATION RESOURCES INC | 1 | 2017 |
Locations
| Location | Patents | Span |
|---|---|---|
| Krefeld, DE | 2 | 1991–1993 |
| Chicago, Illinois, US | 1 | 2017 |
| Schweibheim, DE | 1 | 1992 |