(under subclass 37) Apparatus including the structure of single trays and combinations of two or more tray structures.
(1) Note. Subclass 237 of this class has such devices combined with either, or both, (1) heating means, or (2) gas or vapor forcing means.
(2) Note. Search various receptacle classes, such as Classes 217, Wooden Receptacles, 220, Receptacles, and 229, Envelopes, Wrappers, and Paperboard Boxes, for other tray structure.
SEE OR SEARCH THIS CLASS, SUBCLASS:
201+, particularly subclass 233 for receptacle structure.
