Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
AK

Ajay Kalhan — 29 Patents

Microsoft: 29 patents #907 of 40,388Top 3%
Redmond, WA: #327 of 8,547 inventorsTop 4%
Washington: #2,710 of 76,902 inventorsTop 4%
Overall (All Time): #127,851 of 4,157,543Top 4%
29 Patents All Time
Ajay Kalhan has been granted 29 US patents while listed as an inventor at Microsoft. The first was granted in 2002 and the most recent in June 2025. Ajay Kalhan ranks #127,851 of 4,157,543 US inventors in our database (top 3.1%). Patent records list Ajay Kalhan in Redmond, WA, US.

Patents per Year

Patents granted per year, 2002 to 2025Bar chart with a peak of 4 patents in 2021.peak 42002: 1 patents20022004: 1 patents2008: 1 patents20082010: 1 patents2012: 1 patents20122013: 1 patents2014: 2 patents20142015: 2 patents2016: 3 patents20162017: 3 patents2018: 1 patents20182019: 3 patents2021: 4 patents20212022: 2 patents2023: 2 patents20232025: 1 patents2025

Issued Patents All Time

Showing 1–25 of 29 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12326806 Memory management for multiple process instances Manoj Syamala, Vivek Narasayya, Junfeng Dong, Shize Xu, Changsong Li +4 more 2025-06-10
11726905 Memory management for multiple process instances Manoj Syamala, Vivek Narasayya, Junfeng Dong, Shize Xu, Changsong Li +4 more 2023-08-15 $266,941,000
11595319 Differential overbooking in a cloud computing environment Changsong Li, Pankaj Arora, Junfeng Dong, Yi Shan, Christian König +5 more 2023-02-28 $221,092,000
11372770 System and method for determining cache activity and optimizing cache reclamation Junfeng Dong, Manoj Syamala, Vivek Narasayya, Changsong Li, Shize Xu +4 more 2022-06-28 $238,915,000
11256619 Memory management for serverless databases Manoj Syamala, Arnd Christian König, Vivek Narasayya, Junfeng Dong, Shize Xu +4 more 2022-02-22 $301,637,000
11169982 Dynamic deactivation of cold database in database service Tomas Talius, Pankaj Arora, Qun Guo, Shize Xu 2021-11-09 $291,378,000
11150958 Quorum based transactionally consistent membership management in distributed storage Santeri Olavi Voutilainen, Gopala Krishna R. Kakivaya, Lu Xun 2021-10-19 $230,268,000
10936480 Memory management for multiple process instances Manoj Syamala, Vivek Narasayya, Junfeng Dong, Shize Xu, Changsong Li +4 more 2021-03-02 $181,927,000
10891182 Proactive failure handling in data processing systems Hao Xia, Todd F. Pfleiger, Mark C. Benvenuto 2021-01-12 $215,405,000
10423460 Quorum based transactionally consistent membership management in distributed systems Santeri Olavi Voutilainen, Gopala Krishna R. Kakivaya, Lu Xun 2019-09-24 $78,899,000
10225337 Modeling and forecasting reserve capacity for overbooked clusters Karthik Ramachandra, David Johns DeWitt, Shize Xu, Qun Guo, Peter A. Carlin +1 more 2019-03-05 $61,508,000
10223193 Proactive failure handling in data processing systems Hao Xia, Todd F. Pfleiger, Mark C. Benvenuto 2019-03-05 $61,508,000
9888065 Defragmenting clusters with reserved resources Willis Lang, Nikhil Teletia, Alan Dale Halverson, Prashant Varanasi 2018-02-06 $34,955,000
9773015 Dynamically varying the number of database replicas Qun Guo, Pradeep Mani 2017-09-26 $38,019,000
9594620 Proactive failure handling in data processing systems Hao Xia, Todd F. Pfleiger, Mark C. Benvenuto 2017-03-14 $33,293,000
9542465 Quorum based transactionally consistent membership management in distributed storage Santeri Olavi Voutilainen, Gopala Krishna R. Kakivaya, Lu Xun 2017-01-10 $27,928,000
9372882 Partitioning online databases Lev Novik, Andrew E. Kimball, Tony Petrossian, Cihangir Biyikoglu, Santeri Olavi Voutilainen +5 more 2016-06-21 $57,727,000
9350800 Defragmenting clusters with reserved resources Willis Lang, Nikhil Teletia, Alan Dale Halverson, Prashant Varanasi 2016-05-24 $39,484,000
9323636 Proactive failure handling in network nodes Hao Xia, Todd F. Pfleiger, Mark C. Benvenuto 2016-04-26 $32,829,000
9081837 Scoped database connections Lev Novik, Jason Clark, Marc T. Friedman, Andrew E. Kimball, Cihangir Biyikoglu +2 more 2015-07-14 $44,931,000
9053166 Dynamically varying the number of database replicas Qun Guo, Pradeep Mani 2015-06-09 $39,913,000
8887006 Proactive failure handling in database services Hao Xia, Todd F. Pfleiger, Mark C. Benvenuto 2014-11-11 $24,503,000
8805784 Partitioning online databases Lev Novik, Andrew E. Kimball, Tony Petrossian, Cihangir Biyikoglu, Santeri Olavi Voutilainen +5 more 2014-08-12 $19,073,000
8443062 Quorum based transactionally consistent membership management in distributed storage systems Santeri Olavi Voutilainen, Gopala Krishna R. Kakivaya, Lu Xun 2013-05-14 $29,028,000
8326800 Seamless upgrades in a distributed database system Conor Cunningham, Clifford Dibble, Tomas Talius, Santeri Olavi Voutilainen, Jeffrey A. East +2 more 2012-12-04 $15,162,000