Floyd Bell Inc.
14Patents
5Active
14Granted
39Portfolio score
Filing activity: Oct 19, 1977 → Mar 24, 2020 · 3 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8724833B1 | Piezoelectric audible signal with spring contacts and retaining and spacer ring | Electricity | 36 | Active |
| US7090454B2 | Ratchet interlocking housing | Mechanical Engineering; Lighting; Heating | 15 | Expired |
| US4664764A | Cathodic protection of structures | Chemistry; Metallurgy | 15 | Expired |
| USD521403S1 | Front cap for a panel mounted housing | General | 15 | Expired |
| US7505600B2 | Processor control of an audio transducer | Physics | 11 | Active |
| US7920069B2 | Audible, piezoelectric signal with integral visual signal | Physics | 10 | Active |
| US4214131A | Electronic audio signalling device for telephones | Electricity | 10 | Expired |
| US4157459A | Electronic audio signalling device for telephones | Electricity | 10 | Expired |
| US4658419A | Telephone ringer circuit | Electricity | 8 | Expired |
| US4684927A | Annunciator circuit for elevator systems | Physics | 3 | Expired |
| US4653093A | Frequency selective ringer circuit | Electricity | 3 | Expired |
| US7801323B2 | Sound modifying cap for housing | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US11296488B2 | Panel mount for mounting signalling and control devices on control panels | Electricity | 0 | Active |
| USRE31398E | Electronic audio signalling device for telephones | General | 0 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.