Tony Mason, PhD, is a computer systems expert witness specializing in software, operating systems, storage, source-code analysis, trade secrets, patent disputes, software defects, digital forensics, and emerging LLM/AI systems.
He has worked in systems software since the late 1980s, including distributed systems at Stanford, AFS/DCE/DFS at Transarc, and 22 years leading Windows file-system and filter-driver architecture for more than 160 technology companies. He holds a 2025 PhD in Computer Science from UBC, is the primary inventor on 12 issued U.S. patents, and co-authored lex & yacc and Windows NT Device Driver Development.
Dr. Mason has served as a testifying and consulting expert since 2003 in U.S. federal courts, the British Columbia Supreme Court, USPTO/PTAB proceedings, and an international matter. His work has included expert reports, declarations, depositions, Markman-hearing testimony, jury-trial testimony, source-code comparison, software-functionality assessment, and digital-forensics analysis. His testimony in Elmagin Capital LLC v. Chao Chen was cited by name in both the trial-court and Third Circuit decisions; in another trade-secret matter, his methodology survived a Daubert challenge.
Current research focuses on LLM systems reliability and observability.
Areas of Expertise:
- Software
- Programming/Software/Modeling
- Computers Science
- Artificial Intelligence/Machine Learning
- Intellectual Property
- Patent Infringement
- Computer/Digital Forensics
- Electronic Discovery/Evidence
- Data Management/Recover
- Computer Systems
- Computer Security
- Computer Networking
- Cloud Computing/Services
View Dr. Tony Mason's Consulting Profile.
W. Anthony Mason, et al
For years, this has been the definitive and comprehensive technical reference for software engineers, systems programmers, and any engineer who needs to understand Windows NT systems internals. While this text has a fresh new look on the outside, the text, pictures, code samples and references on the inside are vintage 1998. Nevertheless, the book retains a tremendous amount of value in its clear (erudite even) descriptions of the Windows NT operating system architecture and internals; information on the implementation of standard Windows NT kernel mode drivers; Key details on the workings of Windows NT I/O Manager; and detailed technical discussions on interrupt management and synchronization issues.