The Lamson & Sessions Co.
122Patents
5Active
122Granted
44Portfolio score
Filing activity: Dec 2, 1974 → Feb 27, 2007 · 5 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5390465A | Passthrough device with firestop | Mechanical Engineering; Lighting; Heating | 112 | Expired |
| USD576317S1 | Glowing artificial candle flame | General | 102 | Expired |
| USD545458S1 | Artificial candle | General | 88 | Expired |
| US5420376A | Plastic electrical box for installation in poured concrete | Electricity | 83 | Expired |
| US6265662A | Floor box assembly | Electricity | 82 | Expired |
| US5084596A | Electrical box | Electricity | 81 | Expired |
| US5626373A | Draw latch assembly | Emerging Cross-Sectional Technologies | 73 | Expired |
| US7170015B1 | Electrical box | Electricity | 66 | Expired |
| US7432440B2 | Electrical box support | Emerging Cross-Sectional Technologies | 61 | Expired |
| US6179634A | Floor box cover assembly | Electricity | 60 | Expired |
| US5519263A | Three-way toggle dimmer switch | Electricity | 56 | Expired |
| US5450303A | Adjustable lamp assembly | Mechanical Engineering; Lighting; Heating | 51 | Expired |
| US6176523A | Joint for variable wall thickness conduit | Emerging Cross-Sectional Technologies | 51 | Expired |
| USD462664S1 | Low voltage electrical assembly | General | 49 | Expired |
| US5170014A | Mounting fastener for electrical wiring boxes | Electricity | 49 | Expired |
| US4389766A | Method of mounting a fastener | Emerging Cross-Sectional Technologies | 49 | Expired |
| US6004417A | Method for coupling conduits using microencapsulatable solvent adhesive composition | Chemistry; Metallurgy | 48 | Expired |
| US5522577A | Ceiling fan support arrangement | Emerging Cross-Sectional Technologies | 43 | Expired |
| US5547230A | Joint for variable wall thickness conduit | Mechanical Engineering; Lighting; Heating | 42 | Expired |
| US4989905A | Fitting for corrugated tubing | Emerging Cross-Sectional Technologies | 41 | Expired |
| USD379970S | Cover for electrical boxes | General | 40 | Expired |
| US7353961B2 | Outlet box knockout | Electricity | 39 | Expired |
| USD418210S | Conduit fitting | General | 36 | Expired |
| USD413277S | Transmitter for a motion sensor | General | 36 | Expired |
| US5170013A | Mounting fastener for elelctrical wiring boxes | Electricity | 36 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.