Merge pull request #6 from mikeym88/switch-to-new-api-version

Switch to new api version

Author: mikeym88

README.md

@@ -2,16 +2,19 @@
 
 This project is a wrapper for the PatentsView API.
 
-* [PatentsView Glossary](http://www.patentsview.org/api/glossary.html) provides a description of the variables.
+* [PatentsView Glossary](https://patentsview.org/glossary) provides a description of the variables.
 
 ## Similar Projects
 
 * The Patents Client project is a Python client for patents: [PyPI](https://pypi.org/project/patent-client/) | [GitHub](https://github.com/parkerhancock/patent_client) | [Docs](https://patent-client.readthedocs.io/en/latest/).
 
 ## Important Notes:
 
-* Use <https://dev.patentsview.org> and not <https://www.patentsview.org/>; the former is laxer in terms of accepting input
-* Naming is finicky (more so on the second one), even spacing and other character affect the search results (see below).
+* An API key is required, one can be requested [here](https://patentsview.org/apis/keyrequest).
+* There needs to be an environmental variable PATENTSVIEW_API_KEY set to the value of your API key.
+* The endpoints of the new version of the API are at <https://search.patentsview.org>, they had last been at <https://api.patentsview.org/>.
+* The API team produced a [Swagger UI page](https://search.patentsview.org/swagger-ui/) for the new version of the API. Your API key can be entered by pressing the Authorize button.
+* The new version of the API now returns USPC classifications, but we'll use CPC classifications.  After May 2015 the patent office stopped assigning USPCs to utility patents.
 
 ## Remarks about the data
 
@@ -21,15 +24,10 @@ This project is a wrapper for the PatentsView API.
     * As an example: `NETFLIX, INC.` has an `assignee_key_id` of `17594` and an `assignee_id` of `org_2lAuxOpAtNMvtTxhuLmX`; `NETFLIX.COM, INC.` on the other hand an `assignee_key_id` of `org_UNHkzir8tY7NlQrOJKT4` and an `assignee_id` of `363028`. (This of course assumes `NETFLIX, INC.` and `NETFLIX.COM, INC.` are the same company, which is highly probable).
     * The same applies for acquisitions. Example: Company A has patent *X*; once company B acquires company A, patent *X* would still show that it is assigned to company *A*.
     * Probably the same thing holds if a company acquires certain patents of another company.
-* The patents can be assigned to organizations (as opposed to individuals). This is indicated by the 'assignee organization' field returned by the API.
+* The patents can be assigned to organizations (as opposed to individuals). This is indicated by the 'assignees.assignee_organization' field returned by the API.
 * The assignee organizations (i.e. companies) are distinguished by name. Each organization name is a 'separate' company.
     * This means that a patent can be assigned to "IBM", "IBM Inc.", "International Business Machines".
     * Different organization names have different `assignee_id`s and `assignee_key_id`s (see `NETFLIX` example above).
-* **Different endpoints behave differently**: particularly <https://www.patentsview.org/> and <https://dev.patentsview.org>
-    * **Naming is finicky on the first one**: If you search for `Abbott Laboratories` or for `ABBOTT LABORATORIES`, 
-    you will get the same results. If you search for `ABBOTT Laboratories`, `Abbott LABORATORIES`, 
-    or `abbott laboratories`, you will get nothing.
-    * The second one seems to work better, but you still have to replace the carriage return and line break characters.
 
 ## Adding companies
 
@@ -100,7 +98,7 @@ SELECT
 	an.name as "Company Name Listed on Patent",
 	p.year,
 	p.grant_date as "Grant Date",
-	p.uspc_class as "USPC Classes"
+	p.cpc_group_id as "CPC Subsections"
 FROM 
 	patents as p
 JOIN