Patent Strength Score

What It Means

The Patent Strength Score is PatentCliff's proprietary metric for evaluating the overall quality and competitive value of a company's patent portfolio. It produces a numerical score from 0 to 100 and a corresponding letter grade from A (strongest, 80-100) to F (weakest, 0-39), based on four weighted factors derived from USPTO patent data. Portfolio Size (30% weight) measures the total number of active patents, serving as a proxy for research investment and innovation breadth. Claims Breadth (25% weight) evaluates the average number of claims per patent, indicating the scope and depth of protection each patent provides. Time Remaining (25% weight) calculates the average years until expiration across the portfolio, measuring the longevity of the company's patent protection. Portfolio Diversity (20% weight) counts the number of unique CPC (Cooperative Patent Classification) codes represented, reflecting how broadly the company's innovations span different technology areas. Each factor is normalized to a 0-100 scale and combined using the stated weights to produce the composite score. The scoring methodology is designed to identify portfolios that are large, deeply protected, long-lived, and technologically diverse — characteristics that correlate with strong competitive moats and defensive positioning. Companies with Grade A portfolios (IBM, Samsung, Canon) typically hold thousands of patents with broad claims across many technology domains. Companies with lower grades may have smaller portfolios, narrower claims, or significant near-term expiration exposure. The Patent Strength Score is updated weekly as new patent data is processed from the USPTO PatentsView API.

Frequently Asked Questions