Railway Mail Delivery Patents (Class 258)
Miscellaneous (Class 258/1)
Aircraft in flight (Class 258/1.2)
Signaling feature (Class 258/2)
Hand tools (Class 258/3)
Magnetic (Class 258/4)
Projectors (Class 258/5)
Car-positioned receiver or support (Class 258/8)
Laterally sliding receiver or support (Class 258/9)
Longitudinally extending auxiliary track (Class 258/10)
Combined receiver and support (Class 258/11)
Receivers (Class 258/20)
Supports (Class 258/23)

Foreign Patent Art Collections

Class-related foreign documents (Class 258/FOR000)