Inventor

Peter B. Criswell

Inventor

Bethel, MN, US

Overview

16→

Patents

1982–2010

Patent span

Physics

Primary field (CPC G)

Patents· 16 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

G06Fprimary

G06FElectric digital data processing84%

G01RMeasuring electric variables5%

G11CStatic stores5%

H04LTransmission of digital information, e.g. telegraphic communication5%

PatentTitleYear

7,831,807'System and method for expanding the instruction set of an instruction processor'2010 7,451,270'System and method for detecting and correcting errors in a control system'2008 6,654,875'Dual microcode RAM address mode instruction execution using operation code RAM storing control words with alternate address indicator'2003 5,931,940'Testing and string instructions for data stored on memory byte boundaries in a word oriented machine'1999 5,819,072'Method of using a four-state simulator for testing integrated circuit designs having variable timing constraints'1998 5,701,316'Method for generating an internet protocol suite checksum in a single macro instruction'1997 5,168,501'Method for checking hardware errors'1992 5,081,629'Fault isolation for multiphase clock signals supplied to dual modules which are checked by comparison using residue code generators'1992 5,077,739'Method for isolating failures of clear signals in instruction processors'1991 4,989,172'Apparatus and method for checking start signals'1991 4,943,969'Isolation for failures of input signals supplied to dual modules which are checked by comparison'1990 4,924,467'System for checking duplicate logic using complementary residue codes to achieve high error coverage with a minimum of interface signals'1990 4,595,911'Programmable data reformat system'1986 4,556,978'Error checked high speed shift matrix'1985 4,528,640'Method and a means for checking normalizing operations in a computer device'1985 4,366,548'Adder for exponent arithmetic'1982

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1982–1986Patents assigned to SPERRY CORP (4)· patent assignee history

1982–2010Based in Bethel, MN, US· patent location history

1990–2010Patents assigned to UNISYS CORP (11)· patent assignee history

1991Patents assigned to UNISYS COPORATION (1)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
UNISYS CORP	11	1990–2010
SPERRY CORP	4	1982–1986
UNISYS COPORATION	1	1991

Locations

Location	Patents	Span
Bethel, Minnesota, US	16	1982–2010