Download PDF patent files from https://patents.google.com using download url and description

dlpatent

#!/bin/bash
#
# Downloads patent files from patents.google.com as pdf
# Must provide 2 arguments which are.. (quotes encapsulated)
#
#	File URL (pdf download link)
#	Description or name of patent
#
# File will be saved as PATENT#_DESCRIPTION.pdf
#
# Spaces in description will be converted to dots
#

if [ "$#" -eq 2 ]; then

	URL="${1}";
	DESC="${2//\ /\.}";

	# File name from the url, patent pdf file
	FNAME="${URL##*/}";

	# Complete filename to save pdf document to
	NAME="${FNAME%*.pdf}"_"${DESC}".pdf;

	# Check if patent file already exist based on patent number, download or skip
	if [ ! -e *"${FNAME%*.pdf}"* ]; then

		# Get pdf document and save to proper name and list downloaded file
		curl -#Lko "${NAME}" "${URL}" && ls -lah "${NAME}" || echo "ERROR: Could not download file from provided URL.";

	else

		# Skip because file exist...
		>&2 echo "File with patent number ${FNAME%*.pdf} already exist, skipping";
		exit 1;

	fi

else

	>&2 echo -e "$(basename $0):\n\tMust provide 2 arguments as in URL and DESCRIPTION, quotes encapsulated";
	>&2 echo -e "\t\tdlpatent http://blahblah/patent.number.pdf 'Description Of Patent'";
	>&2 echo -e "\t\t--> patent.number_Description.Of.Patent.pdf";
	exit 1;

fi

# Ensure definite exit code
exit 0;