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USPTO Patent Rankings Data through Dec 31, 2025
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John K. Ahlstrom — 19 Patents

DGData General: 11 patents #14 of 327Top 5%
Cisco: 7 patents #2,035 of 13,007Top 20%
Mountain View, CA: #1,135 of 11,022 inventorsTop 15%
California: #31,067 of 386,348 inventorsTop 9%
Overall (All Time): #229,345 of 4,157,543Top 6%
19 Patents All Time
John K. Ahlstrom has been granted 19 US patents while listed as an inventor at Data General. The first was granted in 1984 and the most recent in September 2008. John K. Ahlstrom ranks #229,345 of 4,157,543 US inventors in our database (top 5.5%). Patent records list John K. Ahlstrom in Mountain View, CA, US.

Patents per Year

Patents granted per year, 1984 to 2008Bar chart with a peak of 7 patents in 1985.peak 71984: 1 patents19841985: 7 patents19851987: 2 patents19871988: 1 patents19881989: 1 patents19892000: 1 patents20002001: 3 patents20012002: 1 patents20022004: 1 patents20042008: 1 patents2008

Issued Patents All Time

Showing 1–19 of 19 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
7420927 Method and apparatus for determining troubleshooting information for completed calls in a telecommunications network Mehryar Khalili Garakani, Jochen Weppner, Stephen I. Schleimer, Gerard Berthet 2008-09-02 $43,395,000
6781959 Method and apparatus for determining troubleshooting information for completed calls in a telecommunications network Mehryar Khalili Garakani, Jochen Weppner, Stephen I. Schleimer, Gerard Berthet 2004-08-24 $198,008,000
6418468 Automatically verifying the feasibility of network management policies Stephen I. Schleimer 2002-07-09 $468,456,000
6327618 Recognizing and processing conflicts in network management policies Stephen I. Schleimer 2001-12-04 $877,698,000
6301613 Verifying that a network management policy used by a computer system can be satisfied and is feasible for use Stephen I. Schleimer 2001-10-09 $512,249,000
6249787 Method and apparatus for transmitting images and other objects over a computer network system Stephen I. Schleimer, Paul L. Hickman 2001-06-19 $1,037,375,000
6108655 Method and apparatus for transmitting images and other objects over a computer network system Stephen I. Schleimer, Paul L. Hickman 2000-08-22 $1,167,958,000
4803619 Digital data processing system incorporating apparatus for resolving names David H. Bernstein, Walter A. Wallach, Jr., Michael S. Richmond, John F. Pilat, David A. Farber +2 more 1989-02-07
4731734 Digital computer system incorporating object-based addressing and access control and tables defining derivation of addresses of data from operands in instructions Ronald H. Gruner, Gerald F. Clancy, Craig J. Mundie, Stephen I. Schleimer, Steven Jeffrey Wallach +5 more 1988-03-15 $6,445,000
4675810 Digital data processing system having a uniquely organized memory system using object-based addressing and in which operand data is identified by names accessed by name tables Ronald H. Gruner, Gerald F. Clancy, Craig J. Mundie, Stephen I. Schleimer, Steven Jeffrey Wallach +8 more 1987-06-23 $3,770,000
4661903 Digital data processing system incorporating apparatus for resolving names Walter A. Wallach, Jr., Michael S. Richmond, David H. Bernstein, Richard G. Bratt 1987-04-28 $7,189,000
4517642 Digital computer system having unique means of referring to operands and ability to execute a plurality of internal languages David H. Bernstein, Gerald F. Clancy, Ronald H. Gruner, Craig J. Mundie, Michael S. Richmond +3 more 1985-05-14 $8,610,000
4514800 Digital computer system including apparatus for resolving names representing data items and capable of executing instructions belonging to general instruction sets Ronald H. Gruner, Gerald F. Clancy, Craig J. Mundie, Steven Jeffrey Wallach, Stephen I. Schleimer +7 more 1985-04-30 $8,534,000
4499604 Digital data processing system for executing instructions containing operation codes belonging to a plurality of operation code sets and names corresponding to name table entries Gerald F. Clancy, Ronald H. Gruner, Stephen I. Schleimer, Craig J. Mundie, Steven Jeffrey Wallach +4 more 1985-02-12 $4,485,000
4498131 Data processing system having addressing mechanisms for processing object-based information and a protection scheme for determining access rights to such information Richard G. Bratt, Edward S. Gavrin, Stephen I. Schleimer, John F. Pilat, Walter A. Wallach, Jr. +11 more 1985-02-05 $6,662,000
4498132 Data processing system using object-based information and a protection scheme for determining access rights to such information and using multilevel microcode techniques Brett L. Bachman, Richard A. Belgard, David H. Bernstein, Richard G. Bratt, Gerald F. Clancy +10 more 1985-02-05 $6,662,000
4493023 Digital data processing system having unique addressing means and means for identifying and accessing operands Edward S. Gavrin, Richard G. Bratt, Stephen I. Schleimer, John F. Pilat, Michael S. Richmond +9 more 1985-01-08 $2,040,000
4493027 Method of performing a call operation in a digital data processing system having microcode call and return operations Lawrence H. Katz, Douglas M. Wells, Michael S. Richmond, Richard A. Belgard, Walter A. Wallach, Jr. +4 more 1985-01-08 $2,040,000
4455604 Digital data processing system having addressing means for translating operands into descriptors identifying data, plural multilevel microcode control means, and ability to execute a plurality of internal language dialects Brett L. Bachman, Richard A. Belgard, David H. Bernstein, Richard G. Bratt, Ronald H. Gruner +8 more 1984-06-19 $3,305,000