SIERRA DESIGN GROUP
80Patents
2Active
80Granted
40Portfolio score
Filing activity: Apr 25, 1977 → Apr 1, 2011 · 1 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6537150B1 | Gaming devices having reverse-mapped game set | Physics | 583 | Expired |
| US6811486B1 | Method and apparatus for enhancing game play through savable game play state | Physics | 479 | Expired |
| US6709333B1 | Player identification using biometric data in a gaming environment | Physics | 458 | Expired |
| US6758757B2 | Method and apparatus for maintaining game state | Physics | 379 | Expired |
| US6612928B1 | Player identification using biometric data in a gaming environment | Physics | 373 | Expired |
| US6887154B1 | Shared progressive gaming system and method | Physics | 339 | Expired |
| US6105962A | Rotating disks slot machine | Physics | 310 | Expired |
| US6032955A | Progressive wagering system with jackpots displayed in tangible objects | Human Necessities | 278 | Expired |
| US7035626B1 | Remote gaming using cell phones with location and identity restrictions | Physics | 272 | Expired |
| US6923721B2 | Apparatus and method for maintaining game state | Physics | 237 | Expired |
| US6705944B2 | Multiple game apparatus and method | Physics | 226 | Expired |
| US6368214B1 | Method and device for playing a keno game in which a player is charged for performing game playing actions | Human Necessities | 220 | Expired |
| US6749500B1 | Simulated poker for use with predetermined outcomes | Human Necessities | 215 | Expired |
| US7247098B1 | Combination fingerprint reader and I/O devices for gaming machines | Physics | 213 | Expired |
| US6609969B1 | Apparatus and method for dispensing of awards | Physics | 193 | Expired |
| US7004837B1 | Cashless gaming apparatus, system, and method of use | Physics | 163 | Expired |
| US6899625B2 | Countdown game for a gaming device | Physics | 160 | Expired |
| US6758393B1 | Mobile cashier terminal | Physics | 149 | Expired |
| US6609970B1 | Method and apparatus for dispensing prizes in a gaming system | Physics | 128 | Expired |
| US6500067B1 | Voucher gaming system | Physics | 125 | Expired |
| US6739970B2 | Method and device for playing a game in which a player is charged for performing game playing actions | Human Necessities | 120 | Expired |
| US6780108B1 | Networked multiple bingo game system | Physics | 108 | Expired |
| US6824465B2 | Interactive keno gaming system and method | Physics | 102 | Expired |
| US6652380B1 | Cashless gaming system and method | Physics | 97 | Expired |
| US6648755B1 | Pull-tab manufacturing and distribution system and method | Emerging Cross-Sectional Technologies | 92 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.