Marpac, LLC
13Patents
3Active
13Granted
33Portfolio score
Filing activity: Jun 27, 1977 → Feb 6, 2019
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6497493B1 | Illuminated safety helmet | Emerging Cross-Sectional Technologies | 66 | Expired |
| USD847373S1 | Sound emitting device | General | 51 | Active |
| USD320023S | Electronic sound generator | General | 27 | Expired |
| USD310372S | Portable environmental sound machine | General | 17 | Expired |
| USD347008S | Sound conditioner | General | 17 | Expired |
| USD311065S | Sound conditioner for masking intruding noises | General | 16 | Expired |
| USD335129S | Synthesized telephone call announcer | General | 13 | Expired |
| USD248669S | Electronic sound conditioning device | General | 8 | Expired |
| USD364404S | Sound conditioner | General | 5 | Expired |
| USD559721S1 | Safety light cover | General | 5 | Expired |
| USD926960S1 | Scent device | General | 1 | Active |
| US6406164B1 | Safety light | Mechanical Engineering; Lighting; Heating | 1 | Expired |
| US10720143B2 | Sound emitting device | Physics | 1 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.