Donn Incorporated
53Patents
0Active
53Granted
38Portfolio score
Filing activity: Jul 31, 1978 → Dec 21, 1987
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4640064A | Suspension ceiling system combining snap-up pans and lay-in panels | Fixed Constructions | 66 | Expired |
| US4397127A | Extendable stud for partition walls or the like | Fixed Constructions | 64 | Expired |
| US4578910A | Elevated floor panel system | Emerging Cross-Sectional Technologies | 47 | Expired |
| US4642418A | Utility module for walls and the like | Electricity | 46 | Expired |
| US4696142A | Suspension ceiling with snap-up panels | Fixed Constructions | 39 | Expired |
| US4206578A | Grid tee for suspension ceilings or the like | Fixed Constructions | 39 | Expired |
| US4625491A | Elevated floor panel with integral trim | Fixed Constructions | 37 | Expired |
| US4535580A | Screw slot runner system | Fixed Constructions | 35 | Expired |
| US4744188A | Suspended island ceiling system | Fixed Constructions | 34 | Expired |
| US4621468A | Concrete metal-backed access floor panel | Fixed Constructions | 32 | Expired |
| US4603229A | Utility module for walls | Electricity | 31 | Expired |
| US4646506A | Linear panel ceilings and the like | Fixed Constructions | 30 | Expired |
| US4407011A | Integrated lighting systems for suspended ceilings or the like | Mechanical Engineering; Lighting; Heating | 29 | Expired |
| US4443991A | Demountable partition structure | Fixed Constructions | 26 | Expired |
| US4679375A | Suspension ceiling grid system with narrow-faced grid | Fixed Constructions | 26 | Expired |
| US4408427A | Framing system for demountable walls or the like | Fixed Constructions | 25 | Expired |
| US4520609A | Grid tee for suspension ceilings or the like | Fixed Constructions | 25 | Expired |
| US4505083A | Delineated ceiling grid in suspended ceiling | Fixed Constructions | 24 | Expired |
| US4394794A | Metal fastening system and method | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4817357A | Suspension ceiling grid tee | Fixed Constructions | 23 | Expired |
| US4413457A | Checkered wall or ceiling system | Fixed Constructions | 22 | Expired |
| US4492066A | Suspension ceiling grid system | Fixed Constructions | 21 | Expired |
| US4545170A | Expanded metal products | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4499697A | Suspended ceiling with removable tee sections | Fixed Constructions | 20 | Expired |
| US4546584A | Wall panel system providing resilient joints | Fixed Constructions | 20 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.