Erwin Hoffmann
10Patents
5h-index
17Co-inventors
63Inventor score
Filing activity: Apr 24, 1975 → Oct 21, 1996
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5703342A | Temperature control method using empirically determined characteristics | Physics | 18 | Expired |
| US4804425A | Process and laminator for the continuous production of laminates of foam with facings | Emerging Cross-Sectional Technologies | 17 | Expired |
| US4255105A | Equipment for the continuous production of foam boards | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4527442A | Manual transmission shifting mechanism | Emerging Cross-Sectional Technologies | 8 | Expired |
| US4264291A | Equipment for the continuous production of foam boards | Performing Operations; Transporting | 7 | Expired |
| US4846099A | Apparatus for applying a foam-forming flowable reaction mixture to a substrate | Performing Operations; Transporting | 4 | Expired |
| US4270889A | Equipment for the continuous production of foam boards | Performing Operations; Transporting | 4 | Expired |
| US5619041A | Atomic absorption spectrometer for measuring the mercury concentration in a sample | Physics | 3 | Expired |
| US4931480A | Process for the preparation of polyurethane foams | Chemistry; Metallurgy | 2 | Expired |
| US4025470A | Process for the production of flame-resistant, hard polyurethane foams | Chemistry; Metallurgy | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.