Contact Information:

Resources:

Crown International

CROWN Audio, Inc.
Div. Harman International
P.O. Box 1000
Elkhart, IN 46515-1000

Phone: (574) 294-8000

Email: audioinfo@crownintl.com

Web: http://www.crownaudio.com

U.S.A. Manufacturer: amplifiers, microphones and systems control products

Founded in 1947 by Clarence Moore as International Radio & Electronics Corporation. Began doing business as Crown International in 1975. Crown International was acquired by Harmon International in 2000. Shortly therafter, the broadcast division was repurchased by members of the founder’s family and continues doing business as the restructured International Radio & Electronics Corporation in the broadcast transmitter and RF amplifier fields. Ed 02/27/03

Patents:

Alumni:

*U.S. Patent No. 2,873,318 , 02/10/1959 (app. 11/25/1953, serial 394,260) MAGNETIC RECORDER (class: 360/90; 242/352.2; 242/352.5; 318/760; 360/130.32) Moore, Clarence C. of Elkhart, IN [DjVu186KB] [Comments]

*U.S. Patent No. 3,493,879 , 02/03/1970 (app. 02/12/1968, serial 704,625) HIGH POWER HIGH FIDELITY SOLID STATE AMPLIFIER (class: 330/255; 330/260; 330/267; 330/298) Stanley, Gerald R. of Mishawaka, IN (assignee: International Radio & Electronics Corporation of Elkhart, IN) (Crown International) [DjVu113KB] [Comments]

*U.S. Patent No. 3,498,570 , 03/03/1970 (app. 07/31/1967, serial 657,168) DIFFERENTIAL BRAKING SYSTEM FOR REELING APPARATUS (class: 242/412.1; 242/414.1; 242/422.3; 318/7) Scholfield, Max W. of Goshen, IN (assignee: International radio & Electronics Corporation of Elkhart, IN) (Crown International) [DjVu81KB] [Comments]

*U.S. Patent No. 3,750,044 , 07/31/1973 (app. 05/22/1972, serial 255,428) GRAPHIC EQUALIZER CIRCUIT (class: 330/126; 330/107; 330/151; 333/28R; 333/28T; 381/103; 434/262) Stanley, Gerald R. of Mishawaka, IN (assignee: International Radio & Electronics Corporation of Elkhart, IN) (Crown International) [DjVu108KB] [Comments]

*U.S. Patent No. 3,808,545 , 04/30/1974 (app. 10/04/1972, serial 294,861) HIGH POWER BRIDGE AUDIO AMPLIFIER (class: 330/265; 330/297; 330/298) Stanley, Gerald R. of Mishawaka, IN (assignee: International Radio & Electronics Corporation of Elkhart, IN) (Crown International) [DjVu209KB] [Comments]

U.S. Patent No. 4,123,010, 10/31/1978 (app. 01/02/1975, serial 537,936) ADAPTER HUB FOR A REEL (class: 242/597.1, international: B65H 017/02) Eger, Donald M. of Elkhart, IN (assignee: International Radio & Electronics, Inc. of Elkhart, IN) (Crown International) [PtTxt44KB] [DjVu*99KB]

U.S. Patent No. 4,158,820, 06/19/1979 (app. 02/01/1978, serial 874,040) LOW LEVEL PREAMPLIFIER CIRCUIT (class: 330/149; 330/265; 330/267; 330/294; 330/304 - international: H03F 001/26; H03F 003/183) Stanley, Gerald R. of Mishawaka, IN (assignee: Crown International, Inc. of Elkhart, IN) [Pt-Txt40KB] [DjVu69KB*]

U.S. Patent No. 4,195,267, 03/25/1980 (app. 11/06/1978, serial 957,682) LOW-LEVEL PREAMPLIFIER CIRCUIT (class: 330/265; 330/149; 330/267; 330/294; 330/302; 330/311 - international: H03F 001/26; H03F 001/183) Stanley, Gerald R. of Mishawaka, IN (assignee: Crown International, Inc. of Elkhart, IN) [Pt-Txt40KB] [DjVu94KB*]

U.S. Patent No. 4,330,809, 05/18/1982 (app. 12/31/1979, serial 108,585) THERMAL PROTECTION CIRCUIT FOR THE DIE OF A TRANSISTOR (class: 361/103; 361/79; 374/134 - international: H02H 005/04) Stanley, Gerald R. of Mishawaka, IN (assignee: Crown International, Inc. of Elkhart, IN) [Pt-Txt40KB] [DjVu61KB*]

U.S. Patent No. 4,604,719, 08/05/1986 (app. 10/21/1983, serial 544,280) OSCILLATOR HAVING A SIXTEEN BIT SIGNAL GENERATION UTILIZING AN EIGHT BIT PROCESSOR (class: 708/276; 708/8 - international: G06F 001/02; G06F 015/31; G03B 019/00) Stanley, Gerald R. of Mishawaka, IN (assignee: Crown International, Inc. of Elkhart, IN) [Pt-Txt40KB] [DjVu107KB*]

 
4,611,180 Grounded bridge amplifier protection through transistor thermo protection
4,625,827 Microphone windscreen 
4,633,045 Differential microphone 
4,644,288 Method of fault sensing for power amplifiers having coupled power stages with normally alternate current flow
4,694,499 Directional microphone with acoustic washer 
4,788,452 Switchable DC power supply with increased efficiency for use in large wattage amplifiers
4,807,165 Method for the determination and display of signal arrival time, intensity and direction
5,015,969 Amplifier control system
5,045,990 Sixteen level power supply with asynchronous controller
5,182,465 Amplifier selector for magnetic resonance imaging machine 
5,276,603 Sixteen level power supply with asynchronous controller
5,309,517 Audio multiplexer 
5,345,198 Power supply modulator circuit for transmitter
5,438,503 Slew rate control in a multi-level switch 
5,500,626 Independent amplifier control module
5,513,094 Switch-mode power supply for bridged linear amplifier 
5,657,219 Opposed current power converter 
5,736,906 Power supply modulator circuit for transmitter
5,805,717 Light sensitive switch with microphone
5,862,401 Programmable central intelligence controller and distributed intelligence network for analog/digital control systems 
5,949,296 Power supply modulator circuit for transmitter
D394,858 Front panel for an audio amplifier 

Eger, Donald M.

Moore, Clarence

Moore, Clyde

Raventos, William

Scholfield, Max W.

Stanley, Gerald R.