2024 36 CFR 9.18 – Surface use and patent restrictions

2023 36 CFR 9.18 – Surface use and patent restrictions

2022 36 CFR 9.18 – Surface use and patent restrictions

2021 36 CFR 9.18 – Surface use and patent restrictions

2020 36 CFR 9.18 – Surface use and patent restrictions

2019 36 CFR 9.18 – Surface use and patent restrictions

2016 36 CFR 9.18 – Surface use and patent restrictions

2015 36 CFR 9.18 – Surface use and patent restrictions

2014 36 CFR 9.18 – Surface use and patent restrictions