Inventions related to Shabbat observance include a lamp for Shabbat, Shabbat elevators, Shabbat water hot water urns, electrical switches for use on Shabbat, and others.
Kashrut Patents
Inventions related kashrut, including a feather removing apparatus, kosher pet foods, animal restraining devices for kosher slaughter, kosher marshmallows, and others.
Ritual Items
Patents for various ritual items such as a kippah/visor combination, a prayer breastplate, a prayer shawl wedding canopy, athletic tzitzit, a mikvah, and others.