US43545A - Improvement in arithmetical frames - Google Patents

Improvement in arithmetical frames Download PDF

Info

Publication number
US43545A
US43545A US43545DA US43545A US 43545 A US43545 A US 43545A US 43545D A US43545D A US 43545DA US 43545 A US43545 A US 43545A
Authority
US
United States
Prior art keywords
arithmetical
frames
improvement
arithmetical frames
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Publication date
Application granted granted Critical
Publication of US43545A publication Critical patent/US43545A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B19/00—Teaching not covered by other main groups of this subclass
    • G09B19/02—Counting; Calculating

Landscapes

  • Business, Economics & Management (AREA)
  • Engineering & Computer Science (AREA)
  • Entrepreneurship & Innovation (AREA)
  • Physics & Mathematics (AREA)
  • Educational Administration (AREA)
  • Educational Technology (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Structures Or Materials For Encapsulating Or Coating Semiconductor Devices Or Solid State Devices (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)

Description

US43545D Improvement in arithmetical frames Expired - Lifetime US43545A (en)

Publications (1)

Publication Number Publication Date
US43545A true US43545A (en) 1864-07-12

Family

ID=2113111

Family Applications (1)

Application Number Title Priority Date Filing Date
US43545D Expired - Lifetime US43545A (en) Improvement in arithmetical frames

Country Status (1)

Country Link
US (1) US43545A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995378A (en) * 1974-07-12 1976-12-07 Darnell Eula K Mathematics visual teaching aid
US4856998A (en) * 1988-02-29 1989-08-15 Letha Silas Teaching aids
US20060263823A1 (en) * 2001-09-18 2006-11-23 Gen-Probe Incorporated Detection rpoB sequences of Mycobacterium Tuberculosis

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3995378A (en) * 1974-07-12 1976-12-07 Darnell Eula K Mathematics visual teaching aid
US4856998A (en) * 1988-02-29 1989-08-15 Letha Silas Teaching aids
US20060263823A1 (en) * 2001-09-18 2006-11-23 Gen-Probe Incorporated Detection rpoB sequences of Mycobacterium Tuberculosis

Similar Documents

Publication Publication Date Title
US43545A (en) Improvement in arithmetical frames
US45601A (en)
US45607A (en)
US45255A (en) Improvement in sugar-mold carriages
US41384A (en) Improvement in harvesters
US45280A (en) Improvement in churns
US45653A (en) Improvement in trusses
US44051A (en) Improvement in steel shirt-collars
US41048A (en) Improvement in lamp-burners
US45604A (en)
US45605A (en)
US45606A (en)
US45608A (en)
USD1884S (en)
USD1906S (en)
USD1920S (en)
USD1947S (en)
USD1949S (en)
USD1955S (en)
USD1977S (en)
USD1982S (en) Jbest
USD1983S (en)
USD1998S (en)
USD1943S (en) Cl ll l
USD1973S (en) Best available