US4772023A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slot machine
Assignee: UNIVERSAL 561 OAZA ARAI OYAMA-SHI TOCHIGI-KEN JAPAN KK
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Filing: 1987-03-16
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Granted: 1988-09-20
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Expires: 2007-03-16
Abstract
Abstract A slot machine having X series of symbols arranged side by side which selects a combination of symbols on a winning line. For the selection of a combination of symbols, a random number is sampled from a series of random numbers the number of which is 2 n and is referred to symbol tables associated with each symbol series wherein are coded data on symbols of which the number is equal to the Xth root of 2 n . A combination of symbols is thus selected with the same probability as for sampling a random number.
Inventors
- 👤 Kazuo Okada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:48
CPC Classifications
G; G07; G07F; G07F17/00; G07F17/32; G07F17/3244
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
145 words
A slot machine having X series of lengthwise movable symbols arranged side by side, and means to select a symbol from each said series of lengthwise movable symbols according to a random number sampled at random from a series of random numbers, there being 2 n random numbers in said series of random numbers, so as to provide a combination of X symbols on a line, n being a positive integer, a symbol table individual to each said series of lengthwise movable symbols, said table containing data of said symbols, said data being equal in number to the Xth root of 2 n ; and means for comparing said sampled random number to said data of said symbol table as to each of said X series of lengthwise movable symbols, thereby to identify a specific combination of X symbols corresponding to said sampled random number.
Claim 2
Dependent Claim
145 words
A slot machine having X series of lengthwise movable symbols arranged side by side, and means to select a symbol from each said series of lengthwise movable symbols according to a random number sampled at random from a series of random numbers, there being 2 n random numbers in said series of random numbers, so as to provide a combination of X symbols on a line, n being a positive integer, a symbol table individual to each said series of lengthwise movable symbols, said table containing data of said symbols, said data being equal in number to the Xth root of 2 n ; and means for comparing said sampled random number to said data of said symbol table as to each of said X series of lengthwise movable symbols, thereby to identify a specific combination of X symbols corresponding to said sampled random number.
Claim 3
Dependent Claim
16 words
A slot machine as defined in claim 1, wherein n is 15 and X is 3.
References Cited (Backward Citations)
US4492379A
Cited
US4448419A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-20 | 1992-03-21 | 1992-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-20 | 1996-03-21 | 1996-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-20 | 2000-03-21 | 2000-09-20 | $7700.00 | Window Closed / Lapsed |