The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 17, 1992
Filed:
Nov. 01, 1991
Applicant:
Inventors:
Tatsuo Igushi, Kyoto, JP;
Yoshiaki Togawa, Kyoto, JP;
Assignee:
Horiba, Ltd., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
356336 ; 356343 ;
Abstract
A particular size measuring apparatus uses laser light and monochrome beams of different wavelengths to measure a wide range of particle sizes. The monochrome beams are obtained from a lamp source and are changed in wavelength by a group of band-pass filters, whereby different ranges of particle sizes can be measured for the respective single wavelengths and thus the range of particle sizes capable of being measured can be expanded.