Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Method and equipment for boring and casing air vent holes and/or delivery holes in medium-steep and steep dip coal deposits and rocks of loose structure

Method and equipment for boring and casing air vent holes and/or delivery holes in medium-steep and steep dip coal deposits and rocks of loose structure

US Patent 4558748 · Granted Dec 17, 1985

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Cross-layer optimization in XR-aware ran to limit temporal error propagation2025
Dual resonant wideband meandered PCB antenna2025
Enhancements for faster BWP switching in mobile communications2025
Method and apparatus for dynamic cross-carrier scheduling in mobile communicatio2025
On-demand transmission of aborted HARQ codebooks in mobile communications2024
Mechanisms for feedback of multiple HARQ procedures in a slot in mobile communic2024
Radio-frequency apparatus with multi-band wideband balun and associated methods2024
Radio-frequency apparatus with multi-band balun with improved performance and as2024
Apparatus with partitioned radio frequency antenna and matching network and asso2024
Radio-frequency apparatus with multi-band balun and associated methods2024
Apparatus with partitioned radio frequency antenna and matching network and asso2023
On-demand transmission of aborted HARQ codebooks in mobile communications2022