The Wayback Machine - https://web.archive.org/web/20160428043817/http://patents.justia.com/patents-by-us-classification/27

Undertaking Patents (Class 27)

Miscellaneous (Class 27/1)
Coffins (Class 27/2)
Body preparation (Class 27/21.1)
Casket grave rests (Class 27/26)
Casket carriers (Class 27/27)
Corpse carriers (Class 27/28)
Grave linings (Class 27/29)
Grave coverings (Class 27/30)
Life signals (Class 27/31)
Lowering devices (Class 27/32)
Portable coffin casings (Class 27/35)

Foreign Patent Art Collections

Class-related foreign documents (Class 27/FOR000)

Digests

Coffin lid fasteners (Class 27/DIG1)