Versions of 26 CFR 1.41-5A - Basic research for taxable years beginning before January 1, 1987 on LawServer
2024 26 CFR 1.41-5A – Basic research for taxable years beginning before January 1, 1987
2023 26 CFR 1.41-5A – Basic research for taxable years beginning before January 1, 1987
2022 26 CFR 1.41-5A – Basic research for taxable years beginning before January 1, 1987
2021 26 CFR 1.41-5A – Basic research for taxable years beginning before January 1, 1987
2020 26 CFR 1.41-5A – Basic research for taxable years beginning before January 1, 1987
2019 26 CFR 1.41-5A – Basic research for taxable years beginning before January 1, 1987
2016 26 CFR 1.41-5A – Basic research for taxable years beginning before January 1, 1987
2015 26 CFR 1.41-5A – Basic research for taxable years beginning before January 1, 1987
2014 26 CFR 1.41-5A – Basic research for taxable years beginning before January 1, 1987
2010 26 CFR 1.41-5A – Basic research for taxable years beginning before January 1, 1987
2009 26 CFR 1.41-5A – Basic research for taxable years beginning before January 1, 1987