Dividend checks continue to get fatter in corporate America, as more companies jack up their distribution rates.

Readers of the Income Investor newsletter can certainly appreciate that kind of thinking. Let's take a closer look at some of the companies that inched their payouts higher these past few days.

We can start with PotashCorp (NYSE:POT). The world's largest crop nutrient provider may have fallen short on the bottom line in last week's quarterly report, but it's once again rewarding shareholders for their patience. PotashCorp's new quarter dividend of $0.28 a share is a 33% improvement. This is the fourth time that PotashCorp has boosted its rate over the past two years.

BreitBurn Energy Partners (OTC:BBEPQ) is also energizing its disbursements. The oil and gas limited partnership declared a cash distribution of $0.47 per unit for the quarter, just ahead of the $0.465 per unit rate it was shelling out three months earlier.

Broadcom (NASDAQ: BRCM) also became a bit more generous. The provider of semiconductor solutions for wired and wireless communications is boosting its rate 10% to $0.11 a share every three months. The stock's 1.3% yield isn't going to turn too many heads, but it is an improvement.

Finally, we have Dunkin' Brands (NASDAQ:DNKN) making dough with its doughnuts. The parent company of Dunkin' Donuts and Baskin-Robbins is juicing up its quarterly dividend 27% to $0.19 a share. Dunkin' Brands initiated a distribution policy last year after going public in 2011. This is the company's first increase, but it wouldn't be a surprise if Dunkin' turned this into an annual tradition.

Checks and balances
Subscribers to the Income Investor newsletter can appreciate the companies sending more and more money to their investors. The newsletter singles out companies that are committed to growing their distributions with market-thumping results. A 30-day trial subscription will let you see if it's right for you.

This article represents the opinion of the writer, who may disagree with the “official” recommendation position of a Motley Fool premium advisory service. We’re motley! Questioning an investing thesis -- even one of our own -- helps us all think critically about investing and make decisions that help us become smarter, happier, and richer.