Patent Clearance Search: Finding Hidden FTO Risks

PROBLEM STATEMENT

The Client's Challenge

A wired power module may appear straightforward from a product perspective: it powers a connected sensor and provides communication through interfaces such as RS and CAN. From an intellectual property perspective, however, the combination of these functions can create a more complex search problem.

A client developing or evaluating such a module approached Wissen Research for a Freedom to Operate (FTO) search covering the United States, China and Europe. The objective was to identify patent and patent application references whose claims could be technically relevant to the product architecture and to provide a structured view of the surrounding patent landscape.

The search focused on the following principal product characteristics:

- Wired power delivery to the connected sensor
- Sensor integration with the power module
- RS communication interface
- CAN communication interface
- Communication functionality associated with the connected sensor

CLIENT’S OBJECTIVE

Assess potential patent risks associated with the wired power module across the United States, China and Europe.

Identify patent references whose claims align with the key product features, including wired power delivery, sensor connectivity, RS interface and CAN interface.

Prioritize references covering the complete evaluated feature set while distinguishing closely related patents that contain additional claim elements.

Traditional Investigation Approach

The investigation initially followed a conventional FTO search methodology. The product architecture and its functional characteristics were examined to identify the terminology most likely to appear in patent literature. These concepts were searched using multiple strategies, including:

Conventional Investigation Strategy

Keyword and synonym combinations

IPC/CPC classification searches

Keyword + classification combinations

Jurisdiction filters

Patent status filters

The objective was to maximize coverage while progressively narrowing the results toward patent claims relevant to the actual product configuration.

Traditional FTO Search Workflow

Product Feature Analysis

Study the wired power module architecture
Identify sensor, wired power, RS and CAN functionalities

Keyword & Classification Search

Extract relevant keywords and synonyms
Identify and combine relevant IPC/CPC classifications

Patent Database Search

Search ORBIT, PatSnap, Espacenet and Google Patents
Apply jurisdiction and status filters for the US, China and Europe

Patent Screening & Extended Analysis

Review claims and technical disclosures for product relevance
Conduct assignee, inventor, citation and similarity searches

Claim-to-Feature Mapping

Map relevant claims against the identified product features
Separate complete-feature references from related references containing additional elements

Outcome:

Identify technically relevant patent and patent application references and assess their correspondence with the wired power module’s key product features.

Limitations of Traditional Approaches

Broad technical similarity did not always translate into complete feature alignment.
Several references contained additional claim elements.
Known references did not adequately address the CAN-interface aspect.
Searching the overall product concept produced a large number of near-matches.
A single broad search strategy was not sufficiently effective for isolating the complete technical combination.

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Wissen's Out-of-the-Box Approach

From Broad Product Searching to Feature- and Assignee-Driven FTO Analysis

Recognizing that conventional searching was producing numerous technically similar references with additional claim elements, the investigation evolved beyond a single broad search strategy.
To obtain a more focused view of the patent landscape, the product was decomposed into its individual technical features and separate search strategies were developed around the elements most relevant to the product's architecture.

Identifying Relevant Technology and Patent Owners

A focused analysis was conducted to identify the technical features and assignees most closely associated with wired power module technologies.
The investigation combined the most relevant assignees with the identified IPC/CPC classifications to uncover patent assets that were less apparent through conventional keyword searching alone.

Our Methodology

Traditional Search Limitations

Broad searches produced numerous near-matching references
Several references contained additional claim elements
Known references lacked disclosure of the CAN interface
Generic product-level searching was insufficient for complete feature alignment

Product Feature Decomposition

Break down the wired power module into key technical features
Analyze sensor, power, RS, and CAN functionality independently
Develop feature-specific keywords and synonyms
Identify relevant IPC/CPC classifications

CAN Interface-Focused Investigation

Develop a dedicated search strategy for CAN functionality
Identify patents covering CAN-enabled sensor and power-module architectures
Cross-reference CAN-related findings with the overall product configuration

Assignee & Classification-Based Searching

Identify assignees actively developing relevant technologies
Analyze their patent portfolios
Combine assignee searches with relevant IPC/CPC classes
Screen resulting patent and patent application references

Claim-Level Feature Mapping

Compare identified claims against the product’s key features
Distinguish complete-feature references from partial matches
Separate relevant results from related references containing additional elements

Focused FTO Evidence Set

Shortlist eight relevant patent/patent application references
Identify four references encompassing the complete evaluated feature set
Provide structured claim-to-feature mapping and searcher observations

FTO Search Methodology

The investigation involved a structured, multi-stage patent search focused on the wired power module and its key technical features across the United States, China and Europe.

The investigation initially identified numerous technically similar references, many of which contained additional claim elements. The search strategy was subsequently refined by focusing on the most relevant assignees and combining their patent activity with relevant IPC/CPC classes.

This targeted approach resulted in the identification of eight relevant patent or patent application references, including four references that disclosed the complete set of evaluated product features.

Evidence Collection & Validation

References identified as sufficiently aligned with the evaluated product features were mapped against the product’s key features. For these references, the report included:

Patent/application information

Relevant claims

Product feature mapping

Searcher comments where necessary

Technical observations

This distinction was important because a technically similar patent is not necessarily equivalent to a reference whose claims correspond directly to the product features under investigation.

Technical Challenges Addressed Through Targeted FTO Analysis

Challenge 1: Distinguishing Complete Feature Alignment from Similar References

A key challenge was determining whether identified patents actually covered the complete combination of features implemented in the wired power module, rather than merely describing technically similar systems.

Solution

The identified patent claims were systematically reviewed against the product’s key features, including wired sensor powering, RS interface and CAN interface. The analysis separated references covering the complete evaluated feature set from technically related references containing additional claim elements.

The analysis revealed:

Wired power and sensor functionality
• RS communication interface
• CAN communication interface
• Additional claimed technical elements
• Complete-feature references requiring closer FTO review

This claim-level differentiation enabled the search report to distinguish potentially relevant references from broader technical matches.

Challenge 2: Identifying Relevant Patent Portfolios Through Assignee Analysis

A further challenge was narrowing a broad patent landscape where multiple companies were actively developing technologies related to wired power modules.

Solution

The most relevant assignees identified during the initial search were analyzed and used to develop targeted searches in combination with relevant IPC/CPC classifications. This portfolio-focused approach was then combined with feature-level claim analysis to identify stronger references.

The investigation revealed:

Multiple active technology assignees
• Relevant patent portfolios
• Classification-specific patent activity
• Additional technically relevant references

This approach contributed to the identification of eight shortlisted patent references, including four references encompassing the complete evaluated product feature set.

Results & Business Impact

The investigation ultimately produced eight patent or patent application references that were shortlisted based on their relevance to the evaluated product features.

Key Outcomes

The investigation moved beyond generic wired-power-module terminology and incorporated feature-specific and assignee-driven searches.
Four references were identified as encompassing the complete set of evaluated product features.
References containing additional elements were retained as related results, providing broader context around the technology.
The CAN interface was separately investigated, addressing an important gap observed during the initial search.
Relevant claims were mapped against the product’s identified features within the search report.

Strategic Business Impact

The investigation provided the client with a more structured understanding of the patent environment surrounding the wired power module. The approach can help organizations:

Identify potentially relevant patent assets earlier
Understand which product features attract the greatest patent activity
Prioritize patents for subsequent legal review
Identify technology areas requiring additional investigation

Actual FTO risk depends on factors including claim construction, jurisdiction, legal status, enforceability, expiration, prosecution history and the specific implementation of the product. The search therefore serves as an evidence base for subsequent legal and strategic assessment.

Conclusion & Implications

The FTO investigation began with a relatively straightforward product: a wired power module supporting sensor connectivity, wired power delivery, RS communication and CAN communication.
The initial conventional search successfully established the surrounding patent landscape but produced numerous references containing additional claim elements. Several known references also lacked disclosure relating to the CAN interface.
Rather than continuing to broaden the same search strategy, the investigation was restructured around the product’s individual technical features. A dedicated CAN-interface search was developed, while the most relevant assignees were identified and searched in combination with relevant IPC/CPC classifications.
The resulting strategy uncovered eight patent and patent application references considered relevant to the evaluated product features, including four references identified as encompassing the complete set of evaluated features.
For complex products, decomposing the product into its technical building blocks, identifying the organizations active around those technologies, and reconnecting those elements through claim-level analysis can reveal a more meaningful picture of the surrounding patent landscape.

Could Assignee-Focused Searching Reveal Hidden FTO Risks in a Power Module?