PlainPatent
USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Perpetuum Ltd

USPTO PatentsView assignee record - 9 granted patents across 10 technology areas, active 2015–2021. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: H02K (DYNAMO-ELECTRIC MACHINES).

Explore the portfolio See the ranking
9
Total patents granted
10
CPC technology areas
17.3
Avg claims per patent
-71%
5-year filing velocity

The verdict

Perpetuum holds 9 US patents across 10 technology areas, rank #29,787 of 50,000 tracked assignees.

#29,787
of 50,000 US assignees by volume
Top 69%
by Innovation Score (29.5/100)
17.3
avg claims per patent
-71%
filing velocity, last 5 yrs

Portfolio overview

Perpetuum Ltd has been granted 9 US utility patents between 2015 and 2021, placing Perpetuum Ltd at rank #29,787 across all assignees tracked by PlainPatent. This portfolio spans 10 distinct Cooperative Patent Classification (CPC) subclasses, averaging 17.3 claims per patent with primary concentration in H02K (DYNAMO-ELECTRIC MACHINES). As a Foreign Corporation, Perpetuum Ltd is one of the more focused assignees in the PatentsView dataset. By volume, Perpetuum sits between Peak Theory, Inc. (9 patents, rank #29,783) and Photo Electron Soul Inc. (9 patents, rank #29,791) - the closest US assignees by grant volume. The composite Innovation Score of 29.5/100 blends portfolio volume, filing velocity, technology breadth, and claim depth into a single comparable measure drawn directly from USPTO PatentsView records.

Filing cadence tells the strategic story. Between 2020 and 2025 the company received 2 grants, compared with 7 in the 2015–2019 window, a -71% shift in five-year velocity. A cooling filing rate may reflect portfolio consolidation, shifting priorities, or reduced R&D throughput. The Foreign Corporation classification further shapes interpretation, since corporate, government, and individual filers pursue patents for materially different reasons.

Claim depth and technology breadth together indicate competitive posture. Perpetuum Ltd's 17.3 average claims per patent sits within the typical range for solid legal coverage without excessive prosecution cost, while concentration in 10 subclasses points to a focused technical program. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Perpetuum Ltd against peers pursuing similar technology classes.

Who files at Perpetuum's volume?

Granted US patents 2015–2025 versus its nearest-ranked assignees by volume, this company marked ◀

patents

What this shows Perpetuum holds 9 patents at rank #29,787, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Source USPTO PatentsView, granted utility patents As of 2015–2025

Companies ranked near Perpetuum

By rank, the assignees closest to #29,787 in granted patent volume.

Leaders in H02K (Dynamo-electric Machines)

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

Perpetuum's Innovation Score vs. every tracked assignee

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

30 Top 69% higher than 31% of 50,000 US assignees

0–10: 687 US assignees (1%). Below this entry. 10–20: 2,527 US assignees (5%). Below this entry. 20–30: 13,162 US assignees (26%). Below this entry. 30–40: 15,294 US assignees (31%). This entry sits in this band. 40–50: 11,491 US assignees (23%). Above this entry. 50–60: 5,058 US assignees (10%). Above this entry. 60–70: 1,537 US assignees (3%). Above this entry. 70–80: 234 US assignees (0%). Above this entry. 80–90: 10 US assignees (0%). Above this entry. 90–100: 0 US assignees (0%). Above this entry. This assignee 0 100 every tracked assignee, bucketed by value

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

012345 20152016201820192021 2
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
Perpetuum Ltd patent grants by year, 2015–2025
Year Patents Granted Share of Period
2015 1 11.1%
2016 1 11.1%
2018 1 11.1%
2019 4 44.4%
2021 2 22.2%

Which technologies does Perpetuum Ltd patent most?

Top 10 of 10 technology areas

Patent Moat Analysis

Portfolio Volume Light
Tech Breadth Focused
Claim Depth Standard
Velocity Declining

Where it ranks

Overall rank by patents

#29,787

Across all tracked assignees

Innovation Score

29.5 out of 100

View all rankings →

Data Source

USPTO PatentsView, US granted patents 2015–2025

How is Innovation Score calculated?

Frequently Asked Questions

How many patents does Perpetuum Ltd hold?
Perpetuum Ltd holds 9 US granted patents filed between 2015 and 2021, spanning 10 technology areas.
What is Perpetuum Ltd's Innovation Score?
Perpetuum Ltd has an Innovation Score of 29.5 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).
What technology areas does Perpetuum Ltd focus on?
Perpetuum Ltd's top technology area is H02K (DYNAMO-ELECTRIC MACHINES) with 7 patents. The company has filed patents in 10 CPC subclasses total.
Is Perpetuum Ltd's patent filing rate increasing or decreasing?
Perpetuum Ltd's recent filing velocity is -71% compared to the prior five-year period. Filing activity has slowed relative to earlier years.
What does claim depth mean for Perpetuum Ltd's patents?
Perpetuum Ltd's patents average 17.3 claims each. This falls within the standard range, providing solid legal coverage.
How is the Perpetuum Ltd 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.

How to use this portfolio

Perpetuum's 9 grants land it in the top 69% by Innovation Score, but volume alone doesn't tell you where the strength sits.

  • Read that count against the largest US assignees before treating it as dominance - Perpetuum ranks #29,787 of 50,000. Top 50 holders
  • Most of this portfolio concentrates in H02K - see who else leads that technology area. H02K leaders
  • Check what the four-part Innovation Score actually rewards before comparing it to another company. How the score works

Patent counts and the Innovation Score measure patenting activity, not commercial success or the legal strength of any patent. Many patents are filed defensively. Verify the status of an individual patent against official USPTO records.

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

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

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.