How many patents have ratings (OTR™ scores)?

The Ocean Tomo Ratings™ system rates all U.S. utility patents in all fields of technology. OTR™ scores exist on 99.9% (Based on 2009 internal audit) of all U.S. utility patents issued since January 1, 1976. Also available is historical OTR-6 score data, which is the OTR™ score for that patent as of 6 months prior to the last update. In limited cases, errors or gaps in obtaining data from sources, (i.e. USPTO) prevent the calculation of OTR™ scores, which accounts for a tiny percent of unrated patents.

Do OTR™ scores change over time?

Yes, OTR™ scores can vary over time. As U.S. patents are granted, new information is used by our statistical model to adjust scores.

How often are the scores updated?

All patent information is updated monthly on the 10th of each calendar month. Monthly updates include new patents, updated OTR™ scores, updated patent Assignee information, and updated expiration information. For example, a patent issued on Tuesday, May 27th will be updated by June 10th.

Does the Ocean Tomo Ratings system provide ratings for pre-grant Patent Publications or Applications?

No, currently we do not rate U.S. patent applications prior to issuance due to the uncertainty of patent issuance and a lack of availability of critical information needed for the OTR™ computation.

What Factors are used in computing an OTR score?

There are over 50 discrete factors that make up OTR™ scores. Each factor is independently identified as correlating either positively or negatively with patent maintenance (i.e. whether or not a patent's maintenance fees were paid). These factors are then analyzed in a regression analysis to determine the coefficients and weighting factors which are ultimately used in calculating the OTR™ score. The factors can generally be categorized as Technology Factors (e.g. U.S. Patent Class or IPC), Disclosure Factors (e.g. the length of the detailed description), Claims Factors (e.g. the number or length of independent claims) and Prosecution Factors (e.g. the number of rejections received). For theory and details, please contact us for more information.

What factors go into computing Relevance scores?

Ocean Tomo Ratings™ relevance scores are quantitative representations of the technological relatedness of any one U.S. patent to any other. A relevance score fundamentally represents the probability (on a scale from 0 to 1) that the first patent is citationally related to the second (i.e. that one directly cites the other), independent of the actuality of their citational relationship.

Relevance scores are calculated by analyzing up to six generations of citational information (i.e. one generation includes all patents cited by or citing the reference patent). The analysis essentially determines the degree of overlap between the citational relationships of the two reference patents, and treats more overlapping citational relationships as indicating a higher probability of the two being directly citationally related. The Ocean Tomo Patent Relevance™ module contains over 4.8 billion (as of December 2009) patent-to-patent relevance relationships above a threshold value of 0.05. Typically over 1,000 patents are mapped as ‘relevant’ to a single patent in a rank order (.999 to 0).

Why does a patent show a different assignee on the Ocean Tomo Ratings system than on other websites?

Most other patent websites show only the ‘original’ Assignee for a patent, that is, the Assignee as reflected on the patent’s face. The Original Assignee information on those sites is not updated if and when a patent is subsequently re-assigned to another entity. Therefore, the Ocean Tomo Ratings™ system uses an updated ‘Current Assignee’ based on the USPTO’s Assignment database records in order to properly reflect the most recent owner of a patent. Of course, even this data is subject to a certain error rate caused by errors in the USPTO data itself. If a patent is simultaneously held by multiple assignees, we show the first current patent assignee of record by default.

Are the ratings comprehensive of our company’s portfolio?

Typically, patents are assigned at an Assignee level, and our system is also accessed that way. Many global companies have multiple companies under their umbrella, as a parent company. The parent company has many ‘entities’ or Assignees, and they initially need to make sure to have a complete list of ‘entities’ or Assignees where patents have been assigned. For our subscription clients, we can aggregate the company’s ‘entities’ or Assignees; it’s offered as part of the annual subscription service.

How can I report errors of the system?

If you encounter any errors in the Ocean Tomo Ratings™ data or system, please send an email to support@oceantomo.com describing the details of the error, and we will respond promptly. We greatly appreciate your feedback, and we are always striving to improve the Ocean Tomo Ratings system.

Still have a question? Please email contactratings@oceantomo.com 


All data accessible through OceanTomo.com/ratings was prepared by Ocean Tomo based on proprietary algorithms and other statistical information provided by PatentRatings, LLC. All scores, ratings and ranks are statistical in nature and are based on publicly available data. They are not based on, nor do they consider any legal opinions or other profes­sional opinions, advice or other information (public or otherwise) that may have bearing on the subject matter of the analysis. No direct statistical correlation has been established between IPQ scores and "fair market value," royalty rates, validity, enforceability or infringement and IPQ scores should not be relied upon to prove or establish the existence or probability of such facts. No direct statistical correlation has been established between Relevance scores and patent­ability or materiality, and Relevance scores should not be relied upon to prove, establish or support any opinion of the materiality or patentability of one patent in view of another. Some of the information and services provided by this website may be covered by one or more of the following U.S. patents: 6,556,992; 7,657,476; 7,716,226; and other patents pending. Copyright 2001-2013 PatentRatings, LLC. Copyright 2013 Ocean Tomo, LLC. All rights reserved. 


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