Robert Engelhart has been granted 50 US patents while listed as an inventor at AT&T . The first was granted in 2005 and the most recent in December 2025. Robert Engelhart ranks #53,743 of 4,157,543 US inventors in our database (top 1.3%). Patent records list Robert Engelhart in Bellevue, WA, US.
Patents per Year Patents granted per year, 2005 to 2025 Bar chart with a peak of 5 patents in 2023. peak 5 2005: 1 patents 2005 2006: 1 patents 2007: 3 patents 2007 2008: 2 patents 2009: 1 patents 2009 2010: 4 patents 2011: 3 patents 2011 2013: 1 patents 2014: 3 patents 2014 2015: 3 patents 2016: 1 patents 2016 2017: 4 patents 2018: 2 patents 2018 2019: 1 patents 2020: 4 patents 2020 2021: 3 patents 2022: 1 patents 2022 2023: 5 patents 2024: 5 patents 2024 2025: 2 patents 2025
Issued Patents All Time
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Showing 1–25 of 50 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
12513497 Charging function fallback Saad Hamid , Kashif Nadeem , Nitin Bhakri , Omer Ocak , Nader Nabil Farouk Riad +1 more 2025-12-30
12333329 Dynamic discovery mechanism in 5G systems and methods — 2025-06-17
12041521 Stateless charging and message handling — 2024-07-16
$115,755,000
12003599 Event management mechanism in 5G systems and methods — 2024-06-04
$63,592,000
11985517 Wireless communication network service using Network Repository Functions (NRFs) — 2024-05-14
$71,466,000
11985573 Methods and systems for reporting zero usage for immediate trigger types — 2024-05-14
$71,466,000
11966744 System and method for asynchronous distribution of operations that require synchronous execution Paul Avetoom , Sadique Farooqui , Nader Nabil Farouk Riad 2024-04-23
$77,328,000
11809892 Dynamic discovery mechanism in 5G systems and methods — 2023-11-07
$80,858,000
11751023 Charging function fallback Saad Hamid , Kashif Nadeem , Nitin Bhakri , Omer Ocak , Nader Nabil Farouk Riad +1 more 2023-09-05
$69,662,000
11729587 Dynamic relocation of account information based on mobility of wireless device — 2023-08-15
$40,971,000
11729588 Stateless charging and message handling — 2023-08-15
$40,971,000
11544071 System and method for asynchronous distribution of operations that require synchronous execution Paul Avetoom , Sadique Farooqui , Nader Nabil Farouk Riad 2023-01-03
$60,116,000
11252246 Event management mechanism in 5G systems and methods — 2022-02-15
$86,220,000
11119807 Dynamic discovery mechanism in 5G systems and methods — 2021-09-14
$261,298,000
11083044 Data charging during charging function outages — 2021-08-03
$85,700,000
11048519 System and method for asynchronous distribution of operations that require synchronous execution Paul Avetoom , Sadique Farooqui , Nader Nabil Farouk Riad 2021-06-29
$92,175,000
10813167 Data charging during charging function outages — 2020-10-20
$115,595,000
10742631 Using an IP multimedia subsystem for HTTP session authentication — 2020-08-11
$237,538,000
10536989 Communications path selection in user equipment — 2020-01-14
$63,074,000
10531515 Data charging during charging function outages — 2020-01-07
$150,484,000
10194487 Communications path selection in user equipment — 2019-01-29
$41,238,000
9992183 Using an IP multimedia subsystem for HTTP session authentication — 2018-06-05
$63,137,000
9924562 Communications path selection in user equipment — 2018-03-20
$63,888,000
9674891 Communications path selection in user equipment — 2017-06-06
$43,154,000
9602672 Audio-based text messaging — 2017-03-21
$13,761,000
