Fourfold Symmetry

No. 4 design

H-10100

Hopkins Dickinson

H-10200

Classic

H-10300

Classic

H-10400

H-10410

Classic

H-10500

Reading

H-10600

Reading

H-10700

Classic/Vernacular

H-10800

Classic / Vernacular

H-10900

Russell Erwin

H-11000

Classic

H-11010

Classic

H-11011

Leaf Pattern

H-11100

Leaf Pattern

H-11150

Classic

H-11200

No. 1

H-11300

Classic

H-11400

No. 1

H-11500

Classic

H-11600

Russell Erwin

H-11610

Classic

H-11700

Classic

H-11710

Classic

H-11711

Emblematic

H-11720

Howard

H-11800

Classic

H-11810

Classic

H-11900

Westminster

H-11920

Classic

H-12000

Victoria

H-12100

Newman

H-12200

Classic

H-12300

Scroll Pattern

H-12310

Scroll Pattern

H-12311

Essex

H-12500

Classic

H-12600

Robinson

H-12610

Classic

H-12700

Classic

H-12800

Classic

H-12810

Classic

H-12900

Classic

H-13000

Classic

H-13100

H-13110

Mentone

H-13300

Classic

H-13400

Classic

H-13410

Yale Towne

H-13500

Classic

H-13600

Classic

H-13700

Romanesque

H-13800

Romanesque

H-13900

Classic

H-14000

Vernacular

H-20100

Vernacular

H-20200

Vernacular

H-20300

Keystone

H-20310

Vernacular

H-20400

Vernacular

H-20500

Vernacular

H-20600

H-20601

Nashua Lockwood

H-20700

Vernacular

H-20710

Vernacular

H-20800

Vernacular

H-20900

Vernacular

H-20901

Taylor Boggis

H-21000

Taylor Boggis

H-21100

Taylor Boggis

H-21101

Lorain

H-21110

Kenton

H-21200

Vernacular

H-21300

Reading

H-21400

Vernacular

H-21500

Vernacular

H-21510

Vernacular

H-21600

Vernacular

H-21700

Vernacular

H-21701

Vernacular

H-21800

Linde

H-21900

Linde

H-21910

Vernacular

H-21920

Vernacular

H-22000

Vernacular

H-22010

Vernacular

H-22020

Vernacular

H-22030

Vernacular

H-22040

Vernacular

H-22100

Sargent

H-22200

Vernacular

H-22210

Vernacular

H-22300

Hopkins Dickinson

H-22400

Kenton Union

H-22500

Union

H-22510

Vernacular

H-22600

Vernacular

H-22700

Vernacular

H-22800

A small screen door knob.

H-22810

Vernacular

H-22900

Vernacular

H-23000

Maltese

H-23100

Reading

H-23200

Reading

H-23201

Vernacular

H-23300

Vernacular

H-23400

Vernacular

H-23500

Vernacular

H-23510

Vernacular

H-23600

Vernacular

H-23700

Vernacular

H-23800

Reading

H-23900

Chicago Niles

H-24000

Gothic

H-24100

Gothic

H-24110

Corbin

H-24200

H-24300

Vernacular

H-24310

Vernacular

H-24400

Vernacular

H-24500

Vernacular

H-24600

Gothic

H-24700

Vernacular

H-24800

Vernacular

H-24810

Windsor

H-24900

Windsor

H-24910

Magnolia

H-25000

Magnolia

H-25010

Vernacular

H-25100

Windsor

H-25200

Windsor

H-25210

Vernacular

H-25300

Vernacular

H-25310

Windsor

H-25400

Windsor

H-25410

Windsor

H-25420

Vernacular

H-25500

Italian Renaissance

H-25600

Italian Renaissance

H-25610

Lutetia Design

H-25630

Vernacular

H-25700

Vernacular

H-25800

Vernacular

H-25900

Vernacular

H-26000

Vernacular

H-26100

Vernacular

H-26101

Cairo

H-26200

Halfa

H-26202

Cairo

H-26203

​

H-26210

Vernacular

H-26300

Reading

H-26400

T Design

H-26500

Vernacular

H-26600

Magnolia

H-26700

Eckley

H-26710

Eckley

H-26720

Amarat

H-26800

Montrose

H-26900

Trilby Design

H-27000

Wilton, Essex Designs

H-27100

Montello

H-27200

Montello

H-27210

Vernacular

H-27300

Nashua Lockwood

H-27400

Ireland

H-27500

Vernacular

H-27600

Kenton

H-27700

Vernacular

H-27800

Russell Erwin

H-27900

Niles Chicago

H-28000

Niles Chicago

H-28100

Ireland

H-28200

Vernacular

H-28300

Vernacular

H-28400

Vernacular

H-28500

Vernacular

H-28600

Vernacular

H-28700

Vernacular

H-28800

Vernacular

H-28900

Vernacular

H-29000

Vernacular

H-29100

H-29110

Vernacular

H-29200

Reading

H-29300

Vernacular

H-29400

Vernacular

H-29500

H-29600

Vernacular

H-29700

Xenia

H-29710

Freibury / Salisbury

H-29800

Saarbruck

H-29810

Classic

H-29900

Egyptian

H-30000

Reading

H-30100

A. G. Newman

H-30200

A. G.Newman

H-30210

Kenton

H-30300

Kenton

H-30310

Schroder

H-31000

Melrose

H-40100

Marathon

H-40200

Savoy

H-40300

Paris

H-40400

Touraine

H-40500

Nemours

H-40600

Italian Renaissance

H-40700

Italian Renaissance

H-40710

La Grande

H-40800

Yale Kelp

H-40900

Yale Kelp

H-40901

Schroder

H-40910

Florentine

H-41000

Russell Erwin

H-41100

Classic

H-41105

Russell Erwin

H-41110

Russell Erwin

H-41120

Albany

H-41200

Flanders

H-41300

Flanders

H-41301

Jacobean

H-41400

Lucca

H-41500

Veronese

H-41600

Hadrian

H-41700

Beverly

H-41800

Baltic

H-41900

Erie

H-42000

Yale & Towne

H-42100

Parthenon

H-42200

H-42210

Statford

H-42300

Classic

H-42400

Mantua

H-42500

Bas-Relief

H-42600

Bas-Relief

H-42601

Union Doorknob

H-42610

Albemarle Design

H-42700

C. 1890

H-42800

Truro

H-42900

St. Cloud

H-43000

Normandy

H-43100

Normandy

H-43110

Olympian

H-43200

Nouvelle

H-43300

H-43310

'T' Design

H-43400

Werwick Design

H-43500

St. Clement

H-43600

Ephesus

H-43700

Greek

H-43703

Amherst Design

H-43710

H-43720

Lepanto

H-43800

Unknown

H-43810

Avon

H-43900

Kenilworth

H-43910

Prudhon

H-44000

Niles Chicago

H-44100

H-44110

Dartmoor

H-44200

Thescus

H-44300

Athens

H-44400

Andros / Thetis

H-44500

Thetis

H-44502

Hendon

H-44510

Westminster

H-44600

H-44610

Cantebury / Winthrop

H-44700

Cadiz

H-44800

Cadiz

H-44810

Valencia

H-44900

Russell & Erwin

H-44910

Amboise

H-44920

Tours

H-45000

C. 1900

H-45010

C. 1905

H-45100

Italian Gothic

H-45200

Murano

H-45201

​

H-45205

Sienna Design

H-45210

Authon

H-45300

Nantes

H-45310

Belfonte

H-45400

Russell & Erwin

H-45500

Racine

H-45600

Vendome

H-45700

Stratford

H-45800

Mura /Brighton

H-45900

Nantes, Toulon Design

H-46000

Farnham

H-46100

Argyle

H-46200

Renaissance

H-46300

Renaissance

H-46301

Brunswick

H-46400

Hartford

H-46500

No. 7

H-46600

Sargent

H-46700

449 Design

H-46800

Corbin

H-46810

Design 445

H-46820

Greek

H-46900

Greek

H-47000

Niles Chicago

H-47100

Chantilly

H-47200

Bavarian

H-47300

Marquette

H-47400

Flemish

H-47500

Orleans Design

H-47600

Greek

H-47700

Cottage

H-47800

Rococo

H-47900

H-48

Flanders

H-48000

Leroy

H-48100

Balmoral / Chalons

H-48200

C. 1900

H-48300

H-48302

H-48310

H-48320

Schroder

H-48350

Classic

H-48360

H-48400

C. 1910

H-48500

C. 1910

H-48600

H-48610

Landon

H-48700

Toulon

H-48710

H-48711

Montfort

H-48730

Lyons

H-48800

Dijon

H-48900

York / Oxford

H-48902

Jarrow / Ellesmere

H-48910

Newark

H-48913

Warwick

H-48920

St. Johns

H-49000

H-49010

Friedland Design

H-49100

Gothic

H-49200

Durex

H-49300

Yale & Towne

H-49310

Dacia

H-49400

Leicester

H-49500

Delft

H-49510

Novara

H-49600

St. Germain

H-49800

Westminster

H-49900

Brandenburg

H-49903

C. 1910

H-50000

Croatia

H-50100

Arno Design

H-50200

H-50300

H-50400

Modern

H-50402

H-50410

Modern

H-50420

Modern

H-50430

Cologne

H-50500

Garton

H-50510

Gotha

H-50600

H-50700

H-50710

Schroder

H-50800

H-50810

H-50900

Italian Renaissance

H-51000

Kirkby

H-51010

H-51020

Breton

H-51030

Adams & Westlake

H-51100

H-51200

H-51300

Mayflower

H-52000

Wm. Tonks & Sons, London

H-52005

Schroder

H-52100

Schroder

H-52110

H-52120

H-52130

Khartoum

H-52140

Philadelphia Design

H-52200

Moreau

H-52400

C. 1895

H-52500

Dijon

H-52600

Breslau

H-53000

Schroder

H-53100

H-53200

Wilton / Warren

H-53400

H-53410

H-53500

H-53600

Navarre

H-54000

Navarre

H-54100

H-54110

Elba

H-54200

Renault

H-56000

Corbin

H-56100

Corbin

H-56110

Union Doorknob

H-56120

Penn

H-56200

H-56300

H-57000

H-57500

H-59999

Clinton

H-60100

Cauyou

H-60300

H-60400

Saloniki

H-61000

Saloniki

H-61001

Roanoke

H-61100

Arcola​

H-61200