EigenLight Corp.
Manufacturer of Fiber Optic Power Monitors and Power Monitor-Attenuators along with Premium Patchcords and Attenuators.
http://www.eigenlight.com/

SV Microwave, Inc.
SV Microwave engineers and manufactures microwave connectors and components for the RF and Microwave industries. SV Microwave has a long history of proven designs that are designed for both military and commercial applications.
http://www.svmicrowave.com/

Sunny Telecom Services Ltd
Offers dummy loads, splitters, attenuators and related items.
http://www.rfancillaries.com

Robinson Laboratories, Inc.
Design and manufacture of microwave components and subassemblies including pin diode switches and attenuators.
http://www.roblab.com

EMC Technology, Inc.
general
http://www.emct.com

XetaComp
A nanobiomaterials company focusing on the manufacture and commercialization of physical sunblocks that are broad-spectrum UVA/UVB attenuators.
http://www.xetacomp.com/

MECA Electronics, Inc.
MECA- Your RF/Microwave component source. Power Dividers, Directional and Hybrid Couplers, Attenuators, Terminations, Isolators and Circulatos.
http://www.e-meca.com/

S. M. Electronics
S. M. Electronics RF, Microwave, & Wireless components including attenuators, dc blocks, adapters, terminations, cable, & waveguide.
http://www.smelectronics.us

Diamond USA, Inc.
Fiber Optic Connectors presented by diausa.com. Learn about fiber optic basics, fiber, jargon, cable, termination, network, estimation, testing, training, and glossary. Fiber Optic Connectors, Cables, Fiber optic adapters, Hybrid Adapters, SC/ST, SC/FC, FC/ST, SC, FC, LC, MT-RJ, low-loss, 0.1dB
http://www.diausa.com/

Jye Bao Co., Ltd.
Manufacturer of RF connecters, adapters, and cable assemblies, attenuators, test leads, dipole antennas, and custom microwave and telecommunications components.
http://www.jyebao.com.tw