Long Manufacturing Ltd.
41Patents
0Active
41Granted
36Portfolio score
Filing activity: May 10, 1974 → Nov 20, 2001
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5343936A | Spiral ripple circumferential flow heat exchanger | Emerging Cross-Sectional Technologies | 98 | Expired |
| US4782891A | Corrosion inhibiting coolant filter | Mechanical Engineering; Lighting; Heating | 89 | Expired |
| US5024268A | Corrosion inhibiting coolant inhibitor container | Mechanical Engineering; Lighting; Heating | 84 | Expired |
| US6536516B2 | Finned plate heat exchanger | Emerging Cross-Sectional Technologies | 82 | Expired |
| US6253837A | By-pass values for heat exchanger | Emerging Cross-Sectional Technologies | 81 | Expired |
| US6273183A | Heat exchanger turbulizers with interrupted convolutions | Mechanical Engineering; Lighting; Heating | 50 | Expired |
| US3952559A | Exposed shackle padlock | Emerging Cross-Sectional Technologies | 50 | Expired |
| USRE35890E | Optimized offset strip fin for use in compact heat exchangers | General | 48 | Expired |
| US5575329A | Passive by-pass for heat exchangers | Emerging Cross-Sectional Technologies | 47 | Expired |
| US5538077A | In tank oil cooler | Emerging Cross-Sectional Technologies | 44 | Expired |
| US4730669A | Heat exchanger core construction utilizing a diamond-shaped tube-to-header joint configuration | Emerging Cross-Sectional Technologies | 41 | Expired |
| US4366687A | Changeable combination lock for desk drawers and the like | Emerging Cross-Sectional Technologies | 38 | Expired |
| US5036911A | Embossed plate oil cooler | Emerging Cross-Sectional Technologies | 38 | Expired |
| US5107922A | Optimized offset strip fin for use in contact heat exchangers | Emerging Cross-Sectional Technologies | 37 | Expired |
| US6340053B1 | Self-enclosing heat exchanger with crimped turbulizer | Mechanical Engineering; Lighting; Heating | 35 | Expired |
| US5875834A | Baffle insert for heat exchangers | Emerging Cross-Sectional Technologies | 32 | Expired |
| US6199626A | Self-enclosing heat exchangers | Mechanical Engineering; Lighting; Heating | 27 | Expired |
| US3973419A | Combination lock construction for luggage zipper locks, shackle locks and the like | Emerging Cross-Sectional Technologies | 27 | Expired |
| US5964282A | Stepped dimpled mounting brackets for heat exchangers | Mechanical Engineering; Lighting; Heating | 27 | Expired |
| US5794691A | Plate heat exchanger with reinforced input/output manifolds | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4031724A | Key controlled lock mechanisms for zipper fasteners | Emerging Cross-Sectional Technologies | 20 | Expired |
| US5253674A | Coolant corrosiveness indicator | Emerging Cross-Sectional Technologies | 20 | Expired |
| US5127433A | Coolant corrosiveness indicator | Emerging Cross-Sectional Technologies | 19 | Expired |
| US6220340A | Heat exchanger with dimpled bypass channel | Emerging Cross-Sectional Technologies | 18 | Expired |
| US6244334A | Self-enclosing heat exchange with shim plate | Mechanical Engineering; Lighting; Heating | 18 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.