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http://www.google.com.au/patents/US789166?utm_source=gb-gplus-share
Patent US789166 - CALENDAR
CALENDAR
CHARLES N. MANFRED et al
› Overview
Abstract
Drawings
Description
Claims
Patent number
: 789166
Filing date
: 21 Jan 1905
Issue date
: 9 May 1905
Inventors
:
CHARLES N. MANFRED
,
CHARLES N. MANFRED
Current U.S. Classification
:
283/2
View patent at USPTO
Search USPTO Assignment Database
Referenced by
Citing Patent
Filing date
Issue date
Original Assignee
Title
US4813707
11 Mar 1988
21 Mar 1989
Perpetual calendar
US4863193
23 Jun 1988
5 Sep 1989
Multi-year calendar
Drawings
Drawings
