Hans Lewer
Inventor
Stats
- 2 US patents issued
- 2 US Applications filed
- most recent filing
This is official USPTO record data
Details
- 2 US Patents Issued
- 2 US Applications Filed
- 13 Total Citation Count
- Jan 30, 1979 Most Recent Filing
- Apr 11, 1978 Earliest Filing
Work History
| Patent Owner | Applications Filed | Year |
|---|---|---|
| Kali und Salz Aktiengesellschaft | 1
| 1979
|
| Chemische Fabrik Kalk GmbH | 1
| 1978
|
Inventor Addresses
| Address | Duration |
|---|---|
| Witten-Annen, DE | Feb 26, 80 - Jan 27, 81 |
Technology Profile
| Technology | Matters | |
|---|---|---|
| E21D: | SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS | 2 |
Patents / Publication
| Patents / Publication # | Year of Publication / Issued | Title | Citations |
|---|---|---|---|
| 4247221 | 1981 | Process for lining tunnels | 8 |
| 4190292 | 1980 | Process for suppressing dust in mines | 3 |
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