William Douglas Johnson — 10 Patents at Landmark Graphics

William Douglas Johnson has been granted 10 US patents while listed as an inventor at Landmark Graphics. The first was granted in 2000 and the most recent in September 2025. William Douglas Johnson ranks #481,000 of 4,157,543 US inventors in our database (top 11.6%). Patent records list William Douglas Johnson in Marietta, GA, US.

Patents per Year

Issued Patents All Time

Showing 1–10 of 10 patents

Patent #	Title	Co-Inventors	Date
12429322	Locating, measuring, and error-checking system	Karan Patel, Hamilton Ross Hughes, James Brian McGlade, Anthony Wentzel, Noah Dawson Underwood +5 more	2025-09-30
10409616	Systems and methods for reducing reservoir simulator model run time	Alejandro Garcia, Jordani Rebeschini, Sergio Henrique Guerra de Sousa, Gerardo Mijares, Jose Antonio Rodriguez +1 more	2019-09-10
9128693	Systems and methods for workflow automation, adaptation and integration	Laurence Reid, Michael Szatny	2015-09-08
8504341	Methods, systems, and computer readable media for fast updating of oil and gas field production models with physical and proxy simulators	Alvin Stanley Cullick	2013-08-06
8352226	Methods, systems, and computer-readable media for real-time oil and gas field production optimization using a proxy simulator	Alvin Stanley Cullick	2013-01-08
8280635	Dynamic production system management	Richard G. Ella, Andrew P. Russell, Laurence Reid	2012-10-02
8195401	Dynamic production system management	Richard G. Ella, Andrew P. Russell, Laurence Reid	2012-06-05
6944616	System and method for historical database training of support vector machines	Ralph Bruce Ferguson, Eric Hartman, Eric Hurley	2005-09-13
6934931	System and method for enterprise modeling, optimization and control	Edward Plumer, Bijan Sayyar-Rodsari, Carl Anthony Schweiger, Ralph Bruce Ferguson, Celso Axelrud	2005-08-23
6047221	Method for steady-state identification based upon identified dynamics	Stephen Piche, James D. Keeler, Eric Hartman, Mark Gerules, Kadir Liano	2000-04-04