The Slide Rule Trading Company has gone out
of business effective June 30, 2023.
The Hemmi Catalogue Raisonne
(Description of every numbered-model slide rule made by Hemmi
Slide Rule Company of Tokyo) has moved to Mike Konshak's International Slide
Rule museum. Click
here to go there.
Hemmi Catalogue II (Description
of every Hemmi slide rule that did not have a model number) has also
moved to the International Slide Rule Museum. Click
here to go there.
And, finally, the POST Slide Rule
Cross Reference (Frederick -Post-labelled slide rules from 1903 on). Has
also moved to the ISRM. Click
here.