USPTO 2015–2025 USPTO PatentsView Foreign Corporation

Liburdi Engineering Limited

USPTO PatentsView assignee record - 10 granted patents across 13 technology areas, active 2016–2022. Filing-trend and competitive-moat analysis cross-referenced to USPTO Patent Public Search. Primary class: B23K (SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM).

Compiled byPlainPatent Editorial, US Patent Intelligence Editorial Team

Explore the portfolio See the ranking

Total patents granted

CPC technology areas

12.2

Avg claims per patent

+0%

5-year filing velocity

The verdict

Liburdi holds 10 US patents across 13 technology areas, rank #26,758 of 50,000 tracked assignees.

#26,758
of 50,000 US assignees by volume: Top 65%
by Innovation Score (30.6/100): 12.2
avg claims per patent: +0%
filing velocity, last 5 yrs

Portfolio overview

Liburdi Engineering Limited has been granted 10 US utility patents between 2016 and 2022, placing Liburdi Engineering Limited at rank #26,758 across all assignees tracked by PlainPatent. This portfolio spans 13 distinct Cooperative Patent Classification (CPC) subclasses, averaging 12.2 claims per patent with primary concentration in B23K (SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM). As a Foreign Corporation, Liburdi Engineering Limited is one of the more focused assignees in the PatentsView dataset. By volume, Liburdi sits between Lenox Corporation (10 patents, rank #26,754) and Littelfuse Semiconductor (wuxi) Co., Ltd. (10 patents, rank #26,762) - the closest US assignees by grant volume. The composite Innovation Score of 30.6/100 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 5 grants, compared with 5 in the 2015–2019 window, a +0% shift in five-year velocity. Steady filing volume suggests sustained innovation without dramatic pivots. 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. Liburdi Engineering Limited's 12.2 average claims per patent sits within the typical range for solid legal coverage without excessive prosecution cost, while concentration in 13 subclasses points to a focused technical program. Combined with portfolio volume, these signals let analysts, investors, and licensing professionals benchmark Liburdi Engineering Limited against peers pursuing similar technology classes.

Lenox

10
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10
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10
Liberty Ollfield…

10
Licella Pty

10
Lightwaves Systems

10
Linktel

10
Littelfuse Semico…

10
Liburdi Engineeri… ◀

10

What this shows Liburdi holds 10 patents at rank #26,758, shown against the 8 assignees closest to it in grant volume rather than the industry's largest filers.

Companies ranked near Liburdi

By rank, the assignees closest to #26,758 in granted patent volume.

Leaders in B23K (Soldering OR Unsoldering)

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

Liburdi's Innovation Score vs. every tracked assignee

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

31 Top 65% higher than 35% of 50,000 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 · 2016–2022

Grants by year

Teal-shaded recent years (2020–present) versus the 2016–2019 baseline. Full figures in the table below.

View data table

Liburdi Engineering Limited patent grants by year, 2015–2025
Year	Patents Granted	Share of Period
2016	1	10.0%
2018	1	10.0%
2019	3	30.0%
2020	2	20.0%
2021	1	10.0%
2022	2	20.0%

Which technologies does Liburdi Engineering Limited patent most?

B23K - SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM 8

C22C - ALLOYS 6

C22F - CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS 5

F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES 2

F05D - INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS 2

C23C - COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL 2

B23P - METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS 2

B33Y - ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING 2

B22F - WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER ; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER 2

Y02P - CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS 2

B05D - PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL 1

B21C - MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL 1

B22D - CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES 1

Top 13 of 13 technology areas

Patent Moat Analysis

Portfolio Volume Light

Tech Breadth Focused

Claim Depth Standard

Velocity Growing

Where it ranks

Overall rank by patents

#26,758

Across all tracked assignees

Innovation Score

30.6 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 Liburdi Engineering Limited hold?

Liburdi Engineering Limited holds 10 US granted patents filed between 2016 and 2022, spanning 13 technology areas.

What is Liburdi Engineering Limited's Innovation Score?

Liburdi Engineering Limited has an Innovation Score of 30.6 out of 100. This composite metric weighs portfolio volume (40%), filing velocity (20%), technology breadth (25%), and claim depth (15%).

What technology areas does Liburdi Engineering Limited focus on?

Liburdi Engineering Limited's top technology area is B23K (SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM) with 8 patents. The company has filed patents in 13 CPC subclasses total.

Is Liburdi Engineering Limited's patent filing rate increasing or decreasing?

Liburdi Engineering Limited's recent filing velocity is +0% compared to the prior five-year period. The company is maintaining or growing its patent output.

What does claim depth mean for Liburdi Engineering Limited's patents?

Liburdi Engineering Limited's patents average 12.2 claims each. This falls within the standard range, providing solid legal coverage.

How is the Liburdi Engineering Limited 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

Liburdi's 10 grants land it in the top 65% 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 - Liburdi ranks #26,758 of 50,000. Top 50 holders
Most of this portfolio concentrates in B23K - see who else leads that technology area. B23K 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

Compiled byPlainPatent Editorial, US Patent Intelligence Editorial Team

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.