Improvements in or connected with Tooth Brushes.
Реферат: 27,790. Addis, R. Dec. 18. Tooth brushes; stocks.-A tooth-brush stock is made of aluminium to prevent decomposition and consequent fouling. The stock is worked by the same processes as the ordinary bone article, and may be fluted to reduce its weight if too heavy.
Improvement in elastic pitmen or connecting-rods
Номер патента: US172903A. Автор: . Владелец: . Дата публикации: 1876-02-01.