Inventor
Franz Chromy
Inventor
Feldkirch, AT
Overview
Patents· 8 as inventor
Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.
B25Dprimary
B25DPercussive tools42%
F16BDevices for fastening or securing constructional elements or machine parts together, e.g. nails, bolts, circlips, clamps, clips or wedges17%
B25BTools or bench devices not otherwise provided for, for fastening, connecting, disengaging, or holding8%
B25CHand-held nailing or stapling tools8%
B27FDovetailed work8%
Y10STechnical subjects covered by former uspc cross-reference art collections [xracs] and digests8%
Y10TTechnical subjects covered by former us classification8%
PatentTitleYear
4,732,219'Hammer drill with pneumatically driven percussion piston'19884,611,670'Motor driven drilling or chipping device'19864,366,869'Hammer drill'19834,222,443'Motor-driven hammer drill'19804,064,949'Electropneumatic hammer'19774,051,990'Device for securing an expansion anchor'19773,996,835'Expansion anchor'19763,951,034'Straddling dowel'1976Career & activity timeline
Assembled from patent assignee/location history and declaration credentials.
1976–1988Patents assigned to HILTI AG (8)· patent assignee history
1976–1988Based in Feldkirch, AT· patent location history
1980–1986Based in Levis, AT· patent location history
Inventor activity
Assignee and location history derived from the patent record.
Assignees
| Assignee | Patents | Span |
|---|---|---|
| HILTI AG | 8 | 1976–1988 |
Locations
| Location | Patents | Span |
|---|---|---|
| Feldkirch, AT | 5 | 1976–1988 |
| Levis, AT | 3 | 1980–1986 |