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David Stewart — 35 Patents

NENexrf: 18 patents #2 of 3Top 70%

SPSprinklr: 3 patents #11 of 45Top 25%

Ricoh Company: 3 patents #4,832 of 9,818Top 50%

Nortel Networks Limited: 1 patents #2,518 of 5,294Top 50%

Cisco: 1 patents #7,948 of 13,007Top 65%

Zephyr Cove, NV: #1 of 36 inventorsTop 3%

Nevada: #222 of 8,397 inventorsTop 3%

Overall (All Time): #96,288 of 4,157,543Top 3%

35 Patents All Time

David Stewart has been granted 35 US patents while listed as an inventor at Nexrf. The first was granted in 1985 and the most recent in September 2025. David Stewart ranks #96,288 of 4,157,543 US inventors in our database (top 2.3%). Patent records list David Stewart in Zephyr Cove, NV, US.

Patents per Year

Issued Patents All Time

Showing 1–25 of 35 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
12412185	Automated aggregation and tracking of voter stances on issues and candidate records	—	2025-09-09
12342313	Location positioning engine system and method	Michael A. Kerr	2025-06-24
12218700	Portable monitoring and sensing device for construction sites	Joseph Stewart	2025-02-04
11861539	Multi-dimensional command center	Justin Trevor Garrity, Ryan Robert Parr	2024-01-02	$21,571,000
11729576	Targeted content delivery	Michael A. Kerr	2023-08-15
11706733	Location positioning engine system and method	Michael A. Kerr	2023-07-18
11062251	Multi-dimensional command center	Justin Trevor Garrity, Ryan Robert Parr	2021-07-13
10909584	Content relevance weighting system	Michael A. Kerr	2021-02-02
10721705	Content Relevance Weighting System	Michael A. Kerr	2020-07-21
10560798	Targeted content delivery	Michael A. Kerr	2020-02-11
10535029	Multi-dimensional command center	Justin Trevor Garrity, Ryan Robert Parr	2020-01-14
10430492	System and method for handset positioning with dynamically updated RF fingerprinting	Michael A. Kerr	2019-10-01
10169774	Network based indoor positioning and geofencing system and method	Michael A. Kerr	2019-01-01
9788155	User interface for geofence associated content	Michael A. Kerr	2017-10-10
9773020	System and method for map based exploration	Michael A. Kerr	2017-09-26
9615347	Location positioning engine system and method	Michael A. Kerr	2017-04-04
9507494	Merchant controlled platform system and method	Michael A. Kerr	2016-11-29
9501786	Interactive display system	Michael A. Kerr	2016-11-22
9430781	Network based indoor positioning and geofencing system and method	Michael A. Kerr	2016-08-30
9406079	Content relevance weighting system	Michael A. Kerr	2016-08-02
9408032	Content delivery system, device and method	Michael A. Kerr	2016-08-02
9396487	System and method for weighting content items	Michael A. Kerr	2016-07-19
9349128	Targeted content delivery	Michael A. Kerr	2016-05-24
9043222	User interface for geofence associated content	Michael A. Kerr	2015-05-26
8743197	System and method for monitoring jump velocity	—	2014-06-03