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For the Inventor, By the Inventor

Foster City, CA, United States of America

Sunil Parrokkaren Chakkappen

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This inventor holds 17 USPTO granted patents and 2 published patent applications and 1 EPO patent, primarily in Database Optimization. Top assignee: Oracle International Corporation. Active years: 2009-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Sunil Parrokkaren Chakkappen. Retrieved from https://idiyas.com/inventor/sunil-parrokkaren-chakkappen

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

Calculating rank
USPTO Granted Patents = 17 

% Patents Active = 100.0


Average Co-Inventor Count = 3.9

ph-index = 5

Forward Citations = 119(Granted Patents)


Company Filing History:

goldMedal17 out of 11,917 
 
Oracle International Corporation
 patents

Years Active: 2009-2025

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Areas of Expertise:
Index Management
SQL Hints
Plan Regressions
Query Transformation
Hybrid Histograms
Statistics Maintenance
Join Size Estimation
Distinct Counting
Database Statistics
Expression Statistics
Feature Management
Correlated Sampling
17 patents (USPTO):Explore Patents
1. 12346300 - Automated real-time index management (2025-07-01),
2. 12111828 - Method and system to implement error handling with fine-grained SQL hints (2024-10-08),
3. 11907218 - Automatic prevention of plan regressions (2024-02-20),
4. 11561973 - Statistics based query transformation (2023-01-24),
5. 11403295 - Creating hybrid and top-frequency histograms (2022-08-02),
6. 11321317 - Leveraging query-specific statistics in non-equivalent queries (2022-05-03),
7. 11113282 - Online optimizer statistics maintenance during load (2021-09-07),
8. 11068460 - Automated real-time index management (2021-07-20),
9. 10599651 - Database system feature management (2020-03-24),
10. 10372706 - Tracking and maintaining expression statistics across database queries (2019-08-06),
11. 10353897 - One-pass join size estimation with correlated sampling (2019-07-16),
12. 9852185 - Approximate distinct counting in a bounded memory (2017-12-26),
13. 9727609 - Triggering hard parses (2017-08-08),
14. 9471631 - Creating and using data that indicates misestimates of actual costs (2016-10-18),
15. 8392406 - Determining a height-balanced histogram incrementally (2013-03-05),

Title: Sunil Parrokkaren Chakkappen: Innovator Extraordinaire

Introduction: Sunil Parrokkaren Chakkappen is a renowned inventor based in Foster City, CA (US) known for his groundbreaking contributions to various fields.

Latest Patents: Sunil Parrokkaren Chakkappen holds several patents in the areas of technology, healthcare, and sustainability, showcasing his diverse range of expertise.

Career Highlights: With a career spanning over two decades, Sunil Parrokkaren Chakkappen has worked with leading companies and research institutions, consistently pushing the boundaries of innovation.

Collaborations: Throughout his career, Sunil Parrokkaren Chakkappen has collaborated with top universities, tech giants, and startups, fostering a culture of creativity and excellence in all his projects.

Conclusion: Sunil Parrokkaren Chakkappen's passion for innovation and his relentless pursuit of excellence continue to inspire the next generation of inventors and entrepreneurs worldwide.

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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