Inventor

CRISWELL PETER B

15 patents

⚠️ This page may combine multiple inventors who share the name “CRISWELL PETER B”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

UNISYS CORP

10 patents

US6654875B1Nov 25, 2003

Dual microcode RAM address mode instruction execution using operation code RAM storing control words with alternate address indicator

UNISYS CORP43 citations92

US5931940AAug 3, 1999

Testing and string instructions for data stored on memory byte boundaries in a word oriented machine

UNISYS CORP51 citations91

US5819072AOct 6, 1998

Method of using a four-state simulator for testing integrated circuit designs having variable timing constraints

UNISYS CORP29 citations91

US5081629AJan 14, 1992

Fault isolation for multiphase clock signals supplied to dual modules which are checked by comparison using residue code generators

UNISYS CORP22 citations86

US7831807B1Nov 9, 2010

System and method for expanding the instruction set of an instruction processor

UNISYS CORP18 citations84

US4924467AMay 8, 1990

System for checking duplicate logic using complementary residue codes to achieve high error coverage with a minimum of interface signals

UNISYS CORP21 citations81

US7451270B1Nov 11, 2008

System and method for detecting and correcting errors in a control system

UNISYS CORP7 citations73

US4943969AJul 24, 1990

Isolation for failures of input signals supplied to dual modules which are checked by comparison

UNISYS CORP11 citations73

US5077739ADec 31, 1991

Method for isolating failures of clear signals in instruction processors

UNISYS CORP4 citations62

US5168501ADec 1, 1992

Method for checking hardware errors

UNISYS CORP0 citations51

SPERRY CORP

4 patents

US4595911AJun 17, 1986

UNISYS COPORATION

1 patent

US4989172AJan 29, 1991

Apparatus and method for checking start signals

UNISYS COPORATION2 citations61