TIMEKEEPING SYSTEMS, INC.
14Patents
5Active
14Granted
39Portfolio score
Filing activity: Jun 12, 1998 → May 31, 2019 · 2 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6834259B1 | Guard tour system | Physics | 52 | Expired |
| US7027955B2 | Guard tour system incorporating a positioning system | Physics | 47 | Expired |
| USD673564S1 | Downloader | General | 46 | Active |
| US7778802B2 | Wireless devices as guard tour checkpoint data collection and checkpoint data communication devices | Electricity | 15 | Expired |
| USD615541S1 | Memory button mount | General | 13 | Expired |
| USD630631S1 | Memory button mount | General | 9 | Expired |
| US7345577B2 | Displays for reporting guard tour data | Physics | 8 | Expired |
| US7363196B2 | Guard tour system | Physics | 7 | Active |
| US6850418B2 | Impact resistant electronic data module housing | Electricity | 7 | Expired |
| US11105909B2 | Tracking system for persons and/or objects | Physics | 3 | Active |
| USD427593S | Watchman data downloader | General | 2 | Expired |
| US9633541B2 | Display system for tracking large numbers of persons and/or objects | Physics | 0 | Active |
| USRE44217E1 | Impact resistant electronic data module housing | General | 0 | Expired |
| US10339174B2 | Automated location visit verification for officer monitoring systems | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.