Gullfiber AB
17Patents
0Active
17Granted
33Portfolio score
Filing activity: Sep 22, 1975 → Nov 7, 1984
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4338929A | Ear-plug | Human Necessities | 59 | Expired |
| US4133053A | Ear-pads and assembly procedure | Electricity | 56 | Expired |
| US4051742A | Arrangement for tensioning and guiding the belts of a cellular plastic forming machine | Mechanical Engineering; Lighting; Heating | 23 | Expired |
| US4498469A | Ear plug as well as a method and apparatus for the production thereof | Human Necessities | 18 | Expired |
| USD244491S | Safety helmet with ear muffs for hearing protection and fastening device therefor | General | 16 | Expired |
| US4375702A | Device for mounting an earmuff on a helmet | Human Necessities | 13 | Expired |
| US4215683A | Ear-plug | Human Necessities | 10 | Expired |
| US4608217A | Method for the production of an ear plug | Human Necessities | 10 | Expired |
| US4008030A | Device for manufacturing blocks of porous thermoplastic in a continuous process | Performing Operations; Transporting | 7 | Expired |
| US4639318A | Tubular filter primarily intended for filtration of liquids | Performing Operations; Transporting | 6 | Expired |
| USD248191S | Ear muff support for a safety helmet with ear muffs | General | 5 | Expired |
| US4517845A | Method and apparatus for determining the flow velocity of a molten, radiation-emitting material | Physics | 4 | Expired |
| US4299074A | Method and apparatus for compressing voluminous material easy to compress | Fixed Constructions | 3 | Expired |
| US4614487A | Ear plug as well as a method and apparatus for the production thereof | Human Necessities | 3 | Expired |
| US4067672A | Apparatus for producing a body of porous thermoplastic material | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4117754A | Transverse cutter | Emerging Cross-Sectional Technologies | 1 | Expired |
| US4164160A | Transverse cutter | Emerging Cross-Sectional Technologies | 1 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.