Dentistry – Apparatus – Broach
Patent
1989-05-05
1991-05-21
Stone, Cary E.
Dentistry
Apparatus
Broach
A61C 502
Patent
active
050171380
ABSTRACT:
Differences in the diameters of successive cutting instruments, either hand- or engine-powered, within sets of instruments described herein progress sequentially by constant percentages of increase, rather than by constant linear increase as is currently the practice in the dental manufacturing industry.
REFERENCES:
patent: 4332561 (1982-01-01), McSpadden
patent: 4518356 (1985-05-01), Green
Pfingst Catalog, No. 33, 1983, p. 21.
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