Where does AcelRx Pharmaceuticals, Inc. rank among US patent assignees?

According to USPTO PatentsView (2015–2025 granted utility patents), AcelRx Pharmaceuticals, Inc. ranks #23,767 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 AcelRx Pharmaceuticals, Inc. hold?

AcelRx Pharmaceuticals, Inc. holds 11 US utility patents granted between 2015 and 2021, spanning 11 technology areas.

What is AcelRx Pharmaceuticals, Inc.'s Innovation Score?

AcelRx Pharmaceuticals, Inc. has an Innovation Score of 33.5 out of 100 (45th 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 AcelRx Pharmaceuticals, Inc. focus on?

AcelRx Pharmaceuticals, Inc.'s top technology area is A61K (Preparations FOR Medical, Dental OR Toiletry Purposes) with 6 patents, ranking #3,449 of 7,163 assignees active in that subclass. Grants appear in 11 CPC subclasses total.

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

AcelRx Pharmaceuticals, Inc.'s recent grant velocity is -62% compared to the prior five-year period (grant years, not application filing dates). Grant activity has slowed relative to earlier years.

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

AcelRx Pharmaceuticals, Inc.'s patents average 21.9 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 AcelRx Pharmaceuticals, 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

AcelRx Pharmaceuticals, Inc.

USPTO PatentsView assignee record - 11 granted patents across 11 technology areas, recorded in grant years 2015–2021. 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: A61K (Preparations FOR Medical, Dental OR Toiletry Purposes).

Compiled by PlainPatent · May 15, 2026

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The verdict

According to USPTO PatentsView, Acelrx ranks #23,767 of 49,997 tracked US assignees by granted-patent volume, with 11 patents across 11 technology areas.

#23,767
of 49,997 US assignees by volume: 45th percentile
by Innovation Score (33.5/100): 21.9
avg claims per patent: -62%
grant velocity, last 5 yrs

USPTO PatentsView assignee plate

Corpus R23767 · US Corporation #23,767 · 11 grants

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

GRANTS-MICRO 11 grants
MID-PACK #23,767/49,997
PHOTO-FINISH Access Bio
CPC-FOCUS A61K · 11 areas
INNOV-THIN 33.5/100
CLAIMS-DENSE 21.9 claims/avg
TYPE-USCORP US Corporation
VEL-DROP -62% vel
BOOK-FULL 10/10 fields

Nearest grant-volume peer: Access Bio, 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 Acelrx’s 33.5 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 8.6 pts (26%) Velocity 0.0 pts (0%) Breadth 11.7 pts (35%) Claim depth 13.1 pts (39%)

Qualcomm Incorporated · highest

85
AcelRx Pharmaceuticals · this assignee

33
3D Lighting… · lowest

7

What this shows Acelrx's Innovation Score is 33.5/100 (45th 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 Acelrx?

Each dot is one of Acelrx’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). Acelrx’s own 21.9 claims/patent is ABOVE the 19.3 median for these volume peers. More thorough claims than most filers at this scale, not just more of them.

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

Where Acelrx's grants concentrate

AcelRx Pharmaceuticals, Inc. is a focused PatentsView assignee: 11 CPC subclasses with 54.5% of grants classified under A61K (Preparations FOR Medical, Dental OR Toiletry Purposes). Peak complete grant year is 2019 (3 grants) versus a trough of 1 in 2015. By volume, Acelrx sits between Access Bio, Inc. and Active Minerals International, LLC.

Access Bio

11
Accessible

11
Accipiter Radar

11
Accudata

11
Acera

11
Acetate Internati…

11
Active Biotech AB

11
Active Minerals I…

11
Acelrx Pharmaceut… ◀

11

What this shows AcelRx holds 11 patents at rank #23,862, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near AcelRx

By rank, the assignees closest to #23,862 in granted patent volume.

Leaders in A61K (Preparations FOR Medical)

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

Acelrx's Innovation Score vs. every tracked assignee

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

33 45th percentile higher than 45% 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 · 2015–2021

Grants by year

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

View data table

AcelRx Pharmaceuticals, Inc. patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2015	1	9.1%
2016	2	18.2%
2017	2	18.2%
2019	3	27.3%
2020	1	9.1%
2021	2	18.2%

Which technologies does AcelRx Pharmaceuticals, Inc. patent most?

A61K - Preparations FOR Medical, Dental OR Toiletry Purposes 6

G16H - Healthcare Informatics, i.e. Information AND Communication Technology [ICT] Specially Adapted FOR THE Handling OR Processing OF Medical OR Healthcare Data 5

A61M - Devices FOR Introducing Media Into, OR Onto, THE Body ; Devices FOR Transducing Body Media OR FOR Taking Media From THE Body ; Devices FOR Producing OR Ending Sleep OR Stupor 5

A61P - Specific Therapeutic Activity OF Chemical Compounds OR Medicinal Preparations 5

A61J - Containers Specially Adapted FOR Medical OR Pharmaceutical PURPOSES; Devices OR Methods Specially Adapted FOR Bringing Pharmaceutical Products Into Particular Physical OR Administering FORMS; Devices FOR Administering Food OR Medicines ORALLY; Baby COMFORTERS; Devices FOR Receiving Spittle 4

G06K - Graphical Data Reading ; Presentation OF DATA; Record CARRIERS; Handling Record Carriers 1

G16Z - Information AND Communication Technology [ICT] Specially Adapted FOR Specific Application Fields, NOT Otherwise Provided FOR 1

H04B - Transmission 1

G07F - Coin-freed OR Like Apparatus 1

H01Q - Antennas, i.e. Radio Aerials 1

G07C - Time OR Attendance REGISTERS; Registering OR Indicating THE Working OF MACHINES; Generating Random NUMBERS; Voting OR Lottery APPARATUS; Arrangements, Systems OR Apparatus FOR Checking NOT Provided FOR Elsewhere 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

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

AcelRx Pharmaceuticals, Inc.'s lead technology class is A61K (Preparations FOR Medical, Dental OR Toiletry Purposes), 54.5% of its portfolio - see every assignee active in that class. Explore A61K
Ranked #23,767 of 49,997 tracked assignees by patent volume - see the full leaderboard. See the ranking
Compare AcelRx Pharmaceuticals, Inc. against Access Bio, Inc., an assignee filing at a similar volume. Compare portfolios
Innovation Score of 33.5/100 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.