Hermann Hoffmann
20Patents
5h-index
43Co-inventors
69Inventor score
Filing activity: Oct 15, 1974 → Mar 17, 2021
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4997912A | Esters of fatty acids, which may be quaternized, from oxalkylated alkylalkylenediamines | Chemistry; Metallurgy | 19 | Expired |
| US4183820A | Use of demulsifying mixtures for breaking petroleum emulsions | Chemistry; Metallurgy | 14 | Expired |
| US5152916A | Aqueous aldehyde solutions for trapping hydrogen sulfide in natural gas and crude oil producing plants | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5225103A | Aqueous aldehyde solutions for trapping hydrogen sulfide in natural gas and crude oil producing plants | Emerging Cross-Sectional Technologies | 13 | Expired |
| US9815556B2 | Aircraft seat device | Performing Operations; Transporting | 7 | Active |
| US7431002B2 | Camshaft with contrarotating cams for automotive engines in particular | Emerging Cross-Sectional Technologies | 4 | Active |
| US5126418A | Alkenylaminomethylenephosphonic acids and copolymers thereof with unsaturated carboxylic acids | Chemistry; Metallurgy | 3 | Expired |
| US7845075B2 | Method for manufacturing a camshaft | Emerging Cross-Sectional Technologies | 3 | Active |
| US7311072B2 | Control unit for a valve, especially a gas exchange valve of an internal combustion engine | Mechanical Engineering; Lighting; Heating | 2 | Expired |
| US10371020B2 | Internal combustion engine | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US7533640B2 | Combustion engine comprising a control cam | Emerging Cross-Sectional Technologies | 2 | Expired |
| US8327815B2 | Adjustable camshaft with a planetary gear | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US4722812A | Salts of alkenylsuccinic acid monoamides | Chemistry; Metallurgy | 1 | Expired |
| US8490587B2 | Cam drive | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US11697501B2 | Passenger seating arrangement | Performing Operations; Transporting | 0 | Active |
| US8857177B2 | Piston engine | Emerging Cross-Sectional Technologies | 0 | Active |
| US11781648B2 | Parking lock for a transmission of an electric or hybrid vehicle | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US7677214B2 | Device for deactivation of at least one cylinder of an internal combustion engine | Mechanical Engineering; Lighting; Heating | 0 | Active |
| US3985724A | 1-(4'-Diazoniumphenyl)-pyridinium salts and the process of preparation | Chemistry; Metallurgy | 0 | Expired |
| US11193586B2 | Parking lock and a transmission having the parking lock | Mechanical Engineering; Lighting; Heating | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.