Where does Stem, Inc. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), Stem, Inc. ranks #15,650 of 49,997 assignees by granted-patent volume, the same sort as the companies listing and top-holders ranking. See /methodology/#corpus-placement.

How many patents does Stem, Inc. hold?

Stem, Inc. holds 19 US utility patents granted between 2015 and 2023, spanning 11 technology areas.

What is Stem, Inc.'s Innovation Score?

Stem, Inc. has an Innovation Score of 34.6 out of 100 (48th percentile of the corpus). This composite metric weighs portfolio volume (40%), grant velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Stem, Inc. focus on?

Stem, Inc.'s top technology area is H02J (Circuit Arrangements OR Systems FOR Supplying OR Distributing Electric POWER; Systems FOR Storing Electric Energy) with 19 patents, ranking #312 of 3,143 assignees active in that subclass. Grants appear in 11 CPC subclasses total.

Is Stem, Inc.'s patent grant rate increasing or decreasing?

Stem, Inc.'s recent grant velocity is +71% compared to the prior five-year period (grant years, not application filing dates). This indicates accelerating grant output.

What does claim depth mean for Stem, Inc.'s patents?

Stem, Inc.'s patents average 18.9 claims each. This is an aggregate descriptive count from the grant record; it does not establish claim scope, legal strength, enforceability, or design-around risk.

How is the Stem, Inc. patent data sourced?

All patent data comes from USPTO PatentsView, a public research dataset maintained by the United States Patent and Trademark Office covering US granted utility patents from 2015 to 2025.

USPTO 2015–2025 USPTO PatentsView US Corporation

Stem, Inc.

USPTO PatentsView assignee record - 19 granted patents across 11 technology areas, recorded in grant years 2015–2023. Grant-trend analysis is cross-referenced to USPTO Patent Public Search; it does not measure application filings, current R&D, or legal strength. Primary class: H02J (Circuit Arrangements OR Systems FOR Supplying OR Distributing Electric POWER; Systems FOR Storing Electric Energy).

Compiled by PlainPatent · May 15, 2026

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Explore the portfolio See the ranking

The verdict

According to USPTO PatentsView, Stem ranks #15,650 of 49,997 tracked US assignees by granted-patent volume, with 19 patents across 11 technology areas.

#15,650
of 49,997 US assignees by volume: 48th percentile
by Innovation Score (34.6/100): 18.9
avg claims per patent: +71%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R15650 · US Corporation #15,650 · 19 grants

GRANTS-MICRO · MID-PACK · PHOTO-FINISH · CPC-FOCUS · INNOV-THIN · CLAIMS-RICH · TYPE-USCORP · VEL-SURGE · BOOK-FULL

GRANTS-MICRO 19 grants
MID-PACK #15,650/49,997
PHOTO-FINISH Southern Motion
CPC-FOCUS H02J · 11 areas
INNOV-THIN 34.6/100
CLAIMS-RICH 18.9 claims/avg
TYPE-USCORP US Corporation
VEL-SURGE +71% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Southern Motion, Inc. (±0 grants)

Instrument codes from this assignee’s USPTO PatentsView grant sheet: volume band, corpus rank, photo-finish peer, lead CPC, Innovation Score, claim depth, assignee type, velocity, and book completeness. Not a USPTO rating of patent strength.

How Stem’s 34.6 Innovation Score adds up

The same four weighted components behind every Innovation Score on PlainPatent: portfolio volume, grant velocity, technology breadth, and claim depth.

Volume 10.3 pts (30%) Velocity 1.2 pts (3%) Breadth 11.7 pts (34%) Claim depth 11.4 pts (33%)

Qualcomm Incorporated · highest

85
Stem · this assignee

35
3D Lighting… · lowest

7

What this shows Stem's Innovation Score is 34.6/100 (48th percentile of the PatentsView-derived corpus). The chart places that score against the nearest Innovation Score peers plus corpus poles, not a reprint of the volume ranking.

Does more volume mean deeper claims for Stem?

Each dot is one of Stem’s 8 nearest volume peers (same corpus rank neighbourhood as the chart above), placed by total granted patents (horizontal) against average claims per patent (vertical). Stem’s own 18.9 claims/patent is ABOVE the 10.7 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

Stem vs its 8 nearest volume peers: granted patents vs average claims per patent. Source: USPTO PatentsView.

Where Stem's grants concentrate

Stem, Inc. is a focused PatentsView assignee: 11 CPC subclasses with 100% of grants classified under H02J (Circuit Arrangements OR Systems FOR Supplying OR Distributing Electric POWER; Systems FOR Storing Electric Energy). Peak complete grant year is 2020 (7 grants) versus a trough of 1 in 2019. By volume, Stem sits between Southern Motion, Inc. and StratoKey Pty Ltd..

Stem's three-year grant acceleration

Stem, Inc. shows 2 grants in 2022–2024 against only 11 in 2019–2021. That prior window is too thin for a growth multiple (rename and spin-out assignees look artificially high when the baseline is near zero), so PlainPatent withholds a ranked acceleration claim here.

Southern Motion

19
Sovaro Coolers

19
Spidercloud Wirel…

19
Spirent Communica…

19
Stemcentrx

19
Stern Pinball

19
Stout Stuff

19
Stratokey Pty

19
Stem ◀

19

What this shows Stem holds 19 patents at rank #15,653, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Stem

By rank, the assignees closest to #15,653 in granted patent volume.

Leaders in H02J (Circuit Arrangements OR Systems FOR Supplying OR Distribu…)

Other assignees with the most granted patents in Stem's primary technology class.

Stem's Innovation Score vs. every tracked assignee

Composite of portfolio volume, grant velocity, technology breadth, and claim depth (0–100)

35 48th percentile higher than 48% of 49,997 US assignees

Each bar is a band; taller bars hold more US assignees. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source USPTO PatentsView, PlainPatent Innovation Score · 2015–2025

USPTO utility patent grants by year · 2015–2023

Grants by year

Teal-shaded recent years (2020–present) versus the 2015–2019 baseline. Full figures in the table below.

View data table

Stem, Inc. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	2	10.5%
2016	2	10.5%
2017	2	10.5%
2019	1	5.3%
2020	7	36.8%
2021	3	15.8%
2022	1	5.3%
2023	1	5.3%

Which technologies does Stem, Inc. patent most?

H02J - Circuit Arrangements OR Systems FOR Supplying OR Distributing Electric POWER; Systems FOR Storing Electric Energy 19

Y02E - Reduction OF Greenhouse GAS [GHG] Emissions, Related TO Energy Generation, Transmission OR Distribution 11

G05F - Systems FOR Regulating Electric OR Magnetic Variables 10

Y04S - Systems Integrating Technologies Related TO Power Network Operation, Communication OR Information Technologies FOR Improving THE Electrical Power Generation, Transmission, Distribution, Management OR Usage, i.e. Smart Grids 10

G05B - Control OR Regulating Systems IN GENERAL; Functional Elements OF Such SYSTEMS; Monitoring OR Testing Arrangements FOR Such Systems OR Elements 8

Y02P - Climate Change Mitigation Technologies IN THE Production OR Processing OF Goods 6

Y02B - Climate Change Mitigation Technologies Related TO Buildings, e.g. Housing, House Appliances OR Related End-user Applications 6

G06Q - Information AND Communication Technology [ICT] Specially Adapted FOR Administrative, Commercial, Financial, Managerial OR Supervisory PURPOSES; Systems OR Methods Specially Adapted FOR Administrative, Commercial, Financial, Managerial OR Supervisory Purposes, NOT Otherwise Provided FOR 4

H02M - Apparatus FOR Conversion Between AC AND AC, Between AC AND DC, OR Between DC AND DC, AND FOR USE With Mains OR Similar Power Supply SYSTEMS; Conversion OF DC OR AC Input Power Into Surge Output POWER; Control OR Regulation Thereof 3

G06F - Electric Digital Data Processing 2

H01M - Processes OR Means, e.g. Batteries, FOR THE Direct Conversion OF Chemical Energy Into Electrical Energy 1

Top 11 of 11 technology areas

More on this record

Data Source

USPTO PatentsView, US granted patents 2015–2025

View all rankings → How is Innovation Score calculated?

What to do with this data

Stem, Inc.'s patent record in context - here's where to go next.

Stem, Inc.'s lead technology class is H02J (Circuit Arrangements OR Systems FOR Supplying OR Distributing Electric POWER; Systems FOR Storing Electric Energy), 100% of its portfolio - see every assignee active in that class. Explore H02J
Ranked #15,650 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare Stem, Inc. against Southern Motion, Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 34.6/100 blends volume, velocity, technology breadth, and claim depth. How it's calculated

Figures reflect USPTO PatentsView grant data through May 2026; pending applications not yet granted are not counted.

Data sourced from USPTO PatentsView - official U.S. government patent data. See our methodology for computation details. Retrieved and formatted by PlainPatent

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the USPTO PatentsView database. Consult a qualified professional before making decisions based on this data.

Read our methodology - how this data is sourced, computed, and verified.

Data sources used on this page

USPTO PatentsView - the disambiguated bulk patent-grant, assignee, and CPC data this page's figures are derived from. patentsview.org
Cooperative Patent Classification (CPC) - the joint USPTO/EPO classification scheme used to group patents by technology area. cooperativepatentclassification.org
USPTO Patent Public Search - the official interface to verify the status of any individual patent. ppubs.uspto.gov

Compiled by PlainPatent, US Patent Intelligence Editorial Process · May 15, 2026

Every figure on PlainPatent is rendered directly from USPTO source data, no number is typed in by an editor. This page draws directly on USPTO source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.