Hewing GmbH
19Patents
0Active
19Granted
35Portfolio score
Filing activity: Aug 6, 1982 → May 4, 2000
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5274972A | Installation duct for utility lines | Fixed Constructions | 49 | Expired |
| US6322108A | Pipe fitting | Mechanical Engineering; Lighting; Heating | 46 | Expired |
| US5332269A | Connecting device for plastic tubes and method for connecting a plastic tube | Emerging Cross-Sectional Technologies | 44 | Expired |
| US4582656A | Method of producing molded articles from polyolefin molding compositions crosslinked by irradiation | Chemistry; Metallurgy | 40 | Expired |
| US5378023A | Pipe connection, particularly on composite pipes | Mechanical Engineering; Lighting; Heating | 37 | Expired |
| US5243800A | Installation duct for utility lines | Fixed Constructions | 33 | Expired |
| US5829795A | Press-fitting device for connection of a tube | Mechanical Engineering; Lighting; Heating | 32 | Expired |
| US5335530A | Pressing tool for pressing a cylindrical pressing member or a pressing member comprising a cylindrical portion onto a round profile, particularly a pipe conduit | Performing Operations; Transporting | 29 | Expired |
| US6361083B1 | Screw joint for pipes | Mechanical Engineering; Lighting; Heating | 25 | Expired |
| US5307664A | Jointing clamp for pressing pipe connections | Emerging Cross-Sectional Technologies | 21 | Expired |
| US6279614A | Multi-layer plastic tube | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4536266A | Process for the fluorination of a surface layer of formed bodies made of plastics | Chemistry; Metallurgy | 16 | Expired |
| US5377400A | Jointing clamp and method for pressing pipe connections | Emerging Cross-Sectional Technologies | 14 | Expired |
| US5220818A | Apparatus for bending pipes with hinged clamping jaws | Performing Operations; Transporting | 5 | Expired |
| US5704537A | Method for sheathing a plastic tube with a metal sheathing | Performing Operations; Transporting | 3 | Expired |
| US6253794A | Conduit in particular for sanitary and heating installation purposes | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US5666820A | Ceiling cooling | Emerging Cross-Sectional Technologies | 2 | Expired |
| US5214888A | Installation duct | Electricity | 1 | Expired |
| US6255623A | Surface heating system formed by a fluid-conducting inner pipe surrounded by a heat-destructible sheathing tube structure | Emerging Cross-Sectional Technologies | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.