More package author’s introduction, please access this link
Instead of loading everything at once into your RAM, you divide your data into chunks.
To quote author of the disk.
Connect from R to Wharton Research Data Services
# to set up connection from R to WRDS (https://wrds-www.wharton.upenn.edu/pages/support/programming-wrds/programming-r/r-from-your-computer/)
library(RPostgres)
library(dplyr)
# I've set up wrds connection before hand. Please use your username and password here.
Comprehensive patent data can be found here
United States
NBER patent data or link
Search link for individual patent: link
Patent API
USPTO - United States patent and Trademark Office
Patent ranking by orgs
Bulk Data Storage System: repository for raw public bulk data
For Researcher
Patent Assignment Dataset details information of patent assignment since 1970 with schema and description and code
Pre-Grant Publications Data Download Tables with example code note that organizaiton here is different from Compustat and CRSP, hard to match.
Information can be found in CRSP/COMPUSTAT MERGED DATABASE GUIDE
Change Identifiers:
Ticker: can be reassign to another company - abbreviation used to uniquely identify publicly-traded shares of a stock
CUSIP: A company can have multiple CUSIPS due to structural changes.