Versions of Ohio Code 4905.304 - Examining coal research and development costs incurred by gas or natural gas company on LawServer 2023 Ohio Code 4905.304 – Examining coal research and development costs incurred by gas or natural gas company 2020 Ohio Code 4905.304 – Examining coal research and development costs incurred by gas or natural gas company 2018 Ohio Code 4905.304 – Examining coal research and development costs incurred by gas or natural gas company 2016 Ohio Code 4905.304 – Examining coal research and development costs incurred by gas or natural gas company 2015 Ohio Code 4905.304 – Examining coal research and development costs incurred by gas or natural gas company 2014 Ohio Code 4905.304 – Examining coal research and development costs incurred by gas or natural gas company 2013 Ohio Code 4905.304 – Examining coal research and development costs incurred by gas or natural gas company 2009 Ohio Code 4905.304 – Examining coal research and development costs incurred by gas or natural gas company