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For the Inventor, By the Inventor

Pittsburgh, PA, United States of America

David A Evans

This inventor holds 24 USPTO granted patents, primarily in Information Retrieval. Top assignees: Claritech Corporation, Justsystems Evans Research, Inc., Clairvoyance Corporation. Active years: 1999-2011.

IDiyas Innovation Intelligence. (2026). Inventor Profile: David A Evans. Retrieved from https://idiyas.com/inventor/david-a-evans

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Calculating rank
USPTO Granted Patents = 24

% Patents Active = 66.7

Average Co-Inventor Count = 1.4

ph-index = 14

Forward Citations = 870(Granted Patents)


Company Filing History:

goldMedal16 out of 35 
 
Claritech Corporation
 patents
silverMedal4 out of 4 
 
Justsystems Evans Research, Inc.
 patents
bronzeMedal3 out of 5 
 
Clairvoyance Corporation
 patents
4. 1 out of 1 
 
Justsystems Evans Reasearch, Inc.
 patent

Years Active: 1999-2011

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Areas of Expertise:
Document Filtering
Text Classification
Information Mining
Language Identification
Ensemble Filters
Search Queries
Cross-Linguistic Retrieval
Document Signatures
Subdocument Analysis
Character Recognition
Vector Space Search
Relevance Analysis
24 patents (USPTO):Explore Patents
1. 7949644 - Method and apparatus for constructing a compact similarity structure and for using the same in analyzing document relevance (2011-05-24),
2. 7472131 - Method and apparatus for constructing a compact similarity structure and for using the same in analyzing document relevance (2008-12-30),
3. 7464096 - Method and apparatus for information mining and filtering (2008-12-09),
4. 7426509 - Method and apparatus for document filtering using ensemble filters (2008-09-16),
5. 7398269 - Method and apparatus for document filtering using ensemble filters (2008-07-08),
6. 7359851 - Method of identifying the language of a textual passage using short word and/or n-gram comparisons (2008-04-15),
7. 7356187 - Method and apparatus for adjusting the model threshold of a support vector machine for text classification and filtering (2008-04-08),
8. 6876998 - Method for cross-linguistic document retrieval (2005-04-05),
9. 6820079 - Method and apparatus for retrieving text using document signatures (2004-11-16),
10. 6532461 - Apparatus and methodology for submitting search oueries (2003-03-11),
11. 6473755 - Overlapping subdocuments in a vector space search process (2002-10-29),
12. 6377947 - Information retrieval based on using and locating subdocuments (2002-04-23),
13. 6363179 - Methodology for displaying search results using character recognition (2002-03-26),
14. 6263329 - Method and apparatus for cross-linguistic database retrieval (2001-07-17),
15. 6226631 - Apparatus and methodology for submitting search queries (2001-05-01),

Title: David A. Evans: A Pioneer in Document Relevance Analysis

Introduction

David A. Evans is an accomplished inventor based in Pittsburgh, PA, known for his innovative contributions to technology and data analysis. With a impressive portfolio of 24 patents, Evans has significantly impacted the field of document relevance and similarity structures.

Latest Patents

Among his notable recent achievements is the patent titled “Method and apparatus for constructing a compact similarity structure and for using the same in analyzing document relevance.” This patent describes a computer-readable medium that encompasses a data structure designed to provide information about the levels of similarity between pairs of documents. The innovative structure comprises a multitude of similarity values that articulate the relational similarities of one document relative to another within various pairs. Notably, the design allows for efficient representation of similarity values, with fewer entries required if the values are symmetric or asymmetric concerning document pairing.

Career Highlights

Throughout his career, David A. Evans has held significant roles at prominent companies, including Claritech Corporation and Justsystems Evans Research, Inc. His work has been characterized by a strong focus on enhancing the efficiency and accuracy of document analysis through innovative methodologies.

Collaborations

Evans has collaborated with distinguished professionals in the field, including his coworkers James G. Shanahan and Michael J. McInerny. These partnerships have fostered the development of cutting-edge technologies and have paved the way for advancements in document relevance analysis.

Conclusion

David A. Evans stands out as a notable inventor in the realm of technology, particularly in the analysis of document relevance. His contributions continue to influence the industry, showcasing his commitment to innovation and excellence in research. With his extensive patent portfolio, Evans remains a key figure in advancing the capabilities of data processing and similarity measurement.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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