Helix Information Services, Inc.
4Patents
0Active
4Granted
25Portfolio score
Filing activity: Oct 20, 1995 → Aug 22, 2003
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5645281A | Method of playing a card game | Human Necessities | 60 | Expired |
| US5725215A | Method for playing a card game | Human Necessities | 22 | Expired |
| US5803460A | Method of playing a card game | Human Necessities | 17 | Expired |
| US6866267B1 | Card game | Human Necessities | 7 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.